I successfully converted this forum to vBulletin on a sandbox. The conversion was a success but there are some things that I haven't been able to transfer over:
I'm not planning to start the site transfer till at least Wednesday or Thursday, so you got time
vBulletin functions pretty much the same as IPB, so you won't be having to relearn anything. They're pretty much the closest thing to ripoffs of each other 
But I have found that vB works a lot better, has some better features, and is faster and more powerful than IPB. So no, no forum "downgrade" like the SWG forums
- Private Messages - Seems like the titles transfer over, but the messages all contain the same message: "array." So back up or export whatever private messages you have or want to save.
- Avatars, photos, or attachments - If you have any of these you want to save, be sure to do so. vBulletin uses a slightly different tree structure for these, so save them so you can just quickly reupload them when the new forums come up.
- Signatures - For some messed up reason those aren't transferring. But the good news is, you'll be able to upload your image in the new software, instead of having to host it somewhere else
I'm not planning to start the site transfer till at least Wednesday or Thursday, so you got time
vBulletin functions pretty much the same as IPB, so you won't be having to relearn anything. They're pretty much the closest thing to ripoffs of each other But I have found that vB works a lot better, has some better features, and is faster and more powerful than IPB. So no, no forum "downgrade" like the SWG forums 
