I received notice from Bluespring about a webinar this week that seems to be bringing together a number of Microsoft partners who are all doing BPM: Bluespring, Ascentn, K2.net and Metastorm. This looks like the marathon of webinars, 2 hours long and including a talk from Colin Teubner at Forrester.
It has the somewhat unwieldy title of Making Your People More Effective Through Business Process Management (BPM) Technology, and you can sign up here.