At its Worldwide Partner Conference (WPC) this week in Denver, Microsoft plans to focus a strong spotlight on its forthcoming CRM Live service, the first of its enterprise applications to offer a fully featured hosted version. The move marks Microsoft's most significant embrace to date of on-demand software delivery -- a shift that makes some partners nervous about the potential sea change that looms. "We do lot of business with Microsoft, but this is the one area where I don't think they've been very clear," said Dave Sobel, CEO of Evolve Technologies, a Fairfax, Va.-based Gold partner. "We've been successful partnering together, with them delivering software and solutions and us delivering services. I can certainly see how SaaS will fit in into this, but I'm still waiting to see what the final product will look like."