After the forum names you can see the tags to find old threads from the corresponding subforum. Below are top topics at the moment when bungie.old was set to read-only.
[b][u]Bungie Universe[/u] -> [url=http://www.bungie.net/en-US/View/community/Forum/Topics?page=0&ty=0&s=1&d=0&tg=%23halo%20%23fiction%20%23campaign%20%23story]#Halo, #Fiction, #Campaign, #Story[/url][/b]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3396502]Bungie's new game (Destiny)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3219745]If you were an Elite (Sangheili), what would your name be?[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3482281]Any secrets left Bungie? Poll link at bottom of first post.[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=2403673]what would your UNSC or Covenant ship name be[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3568120]The Death of Master Chief *UPDATE!*[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3260897]The Importance of Helmets in Halo: Reach. (WALL OF TEXT)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=2194551]What's your favorite dialog from any Halo game or book?[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3633289]Looking for info on Destiny? Wondering about Halo, Come in for info![/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3354977]My God, It's Full of Stars - The Destiny Map - [EARTH LOCATION][/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3416343]Predicting Destiny Based on Halo 3: ODST and Halo Reach[/url]
[b][u]Bungie.net Community[/u] -> [url=http://www.bungie.net/en-US/View/community/Forum/Topics?page=0&ty=0&s=1&d=0&tg=%23septagon%20%23community]#Septagon, #Community[/url][/b]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3596148]Request a ban on a Mythic Member[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=643235]FAQ on Bungie.net Member Titles / Prefixes / Bar Colors[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=680263]Bungie Webcam[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3088213]Swag Central - Discuss your Bungie Swag here!!![/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3284240]Bungie.net Members List (UPDATED: 10.29.2012)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=1221248]Script Central> All GM Scripts Here![/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3596738]Bungie.net History: A Blast From The Past (Now with More Awesomeness!)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3589590]The New Archive of Hilarity.[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3440571]DESTINY: The Joyeuse IP Formula: Version 2.0 (With pictures!)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=2115032]Mapping World Domination[/url]
[b][u]Off Topic: The Flood[/u] -> [url=http://www.bungie.net/en-US/View/community/Forum/Topics?page=0&ty=0&s=1&d=0&tg=%23offtopic%20%23flood]#offtopic, #Flood[/url][/b]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=2800376]How to control your dreams-Lucid dreaming ;Share your experiences!![/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=737253]Say the most Random Facts![/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=2931449]The Flood's Lifehacker Thread[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=743145]Short, Scary Stories![/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3546007]Fitness 101: A Beginner's Guide to Working Out[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=618102]Creepiest things that have happened to you.[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3504358]Want to build a PC? PC Building Guide and FAQ of The Flood[/url]
* [url=http://www.bungie.net/en-us/View/community/Forum/Post?id=1551724]Flood Funny Sayings [What should I do for 100th page?][/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=1686372]What is this Slender man thing?(Looking for new manager, read OP)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=2132023]I-Doser - Audio drugs for the mind[/url]
[b][u]The Gallery Forum[/u] -> [url=http://www.bungie.net/en-US/View/community/Forum/Topics?page=0&ty=0&s=1&d=0&tg=%23gallery%20%23fanart]#Gallery, #FanArt[/url][/b]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3644505]Destiny - ART IN MOTION (Animated Trailer) by Ferino Design[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3133041]Rise of the Spartans (Reach Machinima)[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3619853]The Man Who Sang to the Stars[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3651773]Destiny Fan Art [Reposted from the Flood!][/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3644467]Metal Destiny Logos.[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3650489]Forward Unto Dawn and Requiem (update) [Digital Art][/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=1668878][Novel] True Sangheili (Part 39 available!) ~ 18 December[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3637885]Default avatar made with beads[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3613788]I Am Duct Tape Master Chief[/url]
* [url=http://www.bungie.net/en-US/View/community/Forum/Post?id=3593126]The History of Bungie- A poem.[/url]
[i]for second half see [url=http://www.bungie.net/en-us/View/community/Forum/Post?id=59709157]Part 2 ...[/url][/i]
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Nice find