They've talked it over among themselves and agreed it's the best way forward.
We're still working out the details, but the changes to GTX0 look something like this:
new gtx0 (optional) features
An option to use their post parser (2005 phpbb, so nothing too fancy)
An option to have signatures appear on replies and have posts paginate.
A "Worldbuilding" forum that aggregates the bulk of their posts.
A "Creative" forum that aggregates their creative posts and also posts here that have been tagged that from previous forum mergers (creative outlet for example).
A lot of new interesting posts will get merged into the Science forum here. This and the creative forum will probably be the biggest improvements to GTX0.
Some new posts for Entertainment/Media.
None of this is finalized yet.
The other forum has about 5 or so active members. They should add some new life into our existing forums, and you guys should be able to add some new life into their community as well. I'd like to take the transition slow, integrate the two communities better and work out kinks in programming/etc before sending out the mass email to get the rest of the community here (or at least add them to the pool of lurkers).