Found this on another site. You add your name to it, and then when someone wants to add all those previous entered, they just select all and viola! Just add your name in a comment, and I'll add your twitter name to it.
Don't forget to add those on this list. There might be someone on here you don't have!
How to follow those listed:
Choose Select All
Sign in at the bottom using your twitter info.
Tweep ML will automatically follow all those you haven't previously followed from the group.