Greetings! That's a surprise. Didn't expect someone finding this wiki and posting on it, even if for off-topic reasons. Did Google bring you here?
Concerning the archives, when the LMBs were closing a joint effort was made by people in LMBE to archive 5-10 of the first pages from each forum, so I don't have everything myself (we shared our archives with a mod of LMBE, but the process of those being made public has been slow).
I do have access to the Super Hero RP and Story archives though. Not the main Super Heroes subforum though. For that you'd either have to wait for the archives to be made public or look in the Wayback Machine.
If you wanna look for topics that are not included in those archives (those should be 5 or 10 LMB pages long) or if you want to look for other forums (Super Heroes one included), the Wayback Machine has some of the Boards, so you might be able to find something there: Wayback Machine.
If you're looking for anything else from the LMBs, you could have a look at the other subforums I've archived here. If you're interested in the Classics subforum, do tell me, because I think I've got a better link lying around somewhere.
I think that's about all I can help you with. But hey if you're interested in reading some stories that started in the LMBs, you could hang around here, too! :P But hey since you found the place if you're interested in reading some stories that started in the LMBs, you could hang around here.