There is a complete backup of the RMXP.net Forums database. It is also a very recent backup (downloaded about 12 hours before going down again). I'll be putting it online soon as an archive at lordgradient.com so that everyone who has information stored in the database can retrieve it. Be aware that the database needs to split into a hundred or so segments -- each of which requiring manual insertion into a fresh database -- because of its large size, so it may take some time (less than a week though, unless I get swamped with other things).
In related news, Erk will be taking over the RMXP.net domain. He said he also has a recent backup of the old forums, but it probably isn't as recent as mine. The RMXP.net domain will be used to point to here, not to the old site. Though, if it were decided to point to a new webserver I do still have everything else backed up just in case.
When I get the archives up, I'll be sure to let everyone know right away.