Marketers (bless them) have latched onto the idea of versioning architectures. My inclination, like many others, is to just say no. I've been a generic technology guy long enough to know useless buzz when I hear it. I therefore endorse the petition to say no to SOA 2.0 and recommend that you do as well. SOA 2.0 go home!
Whilst SOA is still gaining ground on the business radar, it's certainly not solidly entrenched enough to assume it is a general success. It is difficult enough trying to explain SOA, services, and the inherent advantages to business without being blindsided by the buzz-version.
Mainly I'm interested to see if it's actually possible to actively kill a buzzword once it's been unleashed. I wonder if this would lead to a new trend? Perhaps the term Buzzkill could take on a whole new meaning.