vBulletin is the bulletin board software AppleInsider will be switching to in the very, very near future.
It is significantly faster than UBB (especially when doing searches) and has a some new features, like the custom time zone mentioned above.
While we *could* try to make the new AppleInsider an identical carbon copy of the old AppleInsider, we have decided to embrace this as a "major" upgrade (which it REALLY is!) and will make a few upgrades to the overall appearance of the site as well. A few new graphics here and there, maybe a different color or two.
Of course, I'm sure some people will b*tch and complain, but that's to be expected with ANY amount of change. And this is a MAJOR change.
Don't worry too much, though. We will try to test the system as thoroughly as we can before putting it in action. We don't want to uglify the place like MacNN did when it upgraded to vB.