WordPress MU

does anybody know what version of the nightly build does wordpress.com or wugga.com i've installed april 13th 2006 version it seems to work fine except for this search deature, Also during the signup process i do not

gimme a blog or just a username feature

as in wordpress or wugga does, how does this work gimme just a username in wordpress mu

You should update to today's snapshot. The code running on wordpress.com is the same as that plus a few extra bits of "added value".

Users and blogs in registration? Just try it. One creates a user, the other creates a blog. Look in wp_user and wp_blogs.