Nehalem in BX900 Blades
The Dynamic Cube BX900 blade server as announced will never support Nehalem EX, you can't drop Nehalem EX processors into any existing XEON design, it requires a whole new motherboard. It seems unlikely that they would have announced a conventional XEON blade if they expected Nehalem EX to be pulled in by six months as it would be obsolete by time it started to ship. So my guess is that availability date for Nehalem EX is unchanged and that systems will show up in late-Q4 to early Q1.