Heh I think my brain needs defragmenting. I'm on my 4th batch, not the 3rd. They do not let you pick, and I have no clue how they come up with the choice, but I think its purely random. They send you one of their official CDBaby mix CDs every time - they have a pretty much infinite amount, since they can mix new ones every few weeks.
On the second batch they sent me their "Wake up UP UP!!!" CD. I don't much care for other peoples' choice of music for me (as I often listen to stuff thats too weird for others), but it was a nice gesture anyway
. I have yet to listen to it. The third time they actually neglected to pack the free CD in. It was on the invoice and everything, but not in the box. Wasn't really worth complaining about. The fourth batch had "Songs for the Lovelorn", which has also started its new job of official dust collector.