BuddyPress.org

hi everyone, i hope this will be appealing for the coders in the forum as i’ve got no clue where to start.
i migrated a single blog WP2.9 to the beta 3.0 (beta 2), but i’m guessing the same problem will be familiar to those using wpmu. i have also got buddypress latest.

i’m testing various things, but the most annoying bit was the fact that although all users registered appear in blogid=1 i would like to add selected users to the new blogs. this seems to be possible vi the settings of each blog by knowing the userid and add users one at a time.
in the database it looks like these are stored in the table wp_bp_user_blogs in which the user id and blog id are stored. Can anyone suggest a sensible way to add multiple users to specific blogs? (yes i could edit the tble in the db manually, but i wouldn’t learn much…)

thanks!