It’s not often that you get free advice from an analyst/consultant, but I gave this one away already today in a conversation with a vendor: don’t ignore BPDM. The fact that Lombardi has already announced support for it as the interchange format between Blueprint and TeamWorks (not a coincidence that Lombardi’s CTO sits on OMG standards committees) even though the standard is not yet released means that it’s likely to be presented to customers as a competitive differentiator by the BPM vendors who implement it very early on in the game. Assuming that it catches on, you’ll still need to support both BPDM and XPDL for a period of 2-5 years.