In the members list in Admin section. I get members awaiting activation tab, but members awaiting approval do not show under it and neither do they get their own tab like they used to in 1.1.7
Oh - should have said 2.0 Beta 4
Edit: I found a link to the fix at http://www.simplemachines.org/community/index.php?topic=262385.msg1725790#msg1725790