Not done one of these in a while.
Basicalorific, say what format you want to record a mixtape on, in this thread, just here, and then on...OOOH...next Monday? Or maybe earlier, i'll pair you up with another DiSer and you can form a beautiful swapperoo relationship together via PMs.
Also if you've done this before it'd be useful to say who you've done compiling with before, because many people last time got the same people as before and WHO WANTS THAT INSANITY! in their life? No-one. That's who.
Hop to it. Maybe try and think of a theme too? Or something. i don't know how to end this post.