I just checked for a Nirvash early bird the other day, too! That's kind of fishy... Anyway, better mark April 1st on the calendar and get that pre order in early, the May RD's all already have full pre orders!
Well after checking out Robot Damashii Blog today, found out some interesting stuff from an inventory spread sheet screen shot:
RD 31 is Masarao RD 32 is Regent RD 33 is a mystery Gundam from 00 (Arche Gundam, or something else?) RD 34 is another LFO from Eureka Seven (Hopefully Devilfish, or perfect Nirvash) RD 44 is Alto's Messiah Valkyrie from Macross F (finally!) RD 46 is a robot from a new series (the name of the series seems to line up with Kido Senshi Gundam when compared to the Kido Senshi Gundam 00 title)
There are at least 5 more Gundam 00 releases after RD 33, There are at least 5 more Code Geass releases after the Lancelot in May