2009 Topps Chrome is live, exactly on schedule. It's a miracle! View the complete checklist here:
2009 Topps Chrome Checklist
I haven't received any of the cards yet, but scans are popping up on ebay. From what I can tell, they are decent looking cards and of course there are tons of rookies and parallels. The basic breakdown of the set is 170 veterans, 50 rookies and 22 rookie autograph variations. There is also a World Baseball Classic insert set made up of 100 players from around the world.
Parallels consist of 1 of 1 Printing Plates, 1 of 1 Superfractors, Red Refractors (#/25), Gold Refractors (#/50), Blue Refractors (#/199) and regular refractors which appear to be numbered to either 499 or 500 (Topps lists both in various places).
There are other sets that I like better, but these look like they are worth a few boxes.