As usual, Brian has posted some great information on the roadmap for VSTS. A great read.
I've been hinting at this coming for while now. I think I promised it would come out in Dec and here it is on the last day of Nov :). I hope this is helpful to you in knowing where we are headed and also in giving us feedback on where we are missing the boat. Please share with us any feedback you have. We are working on getting specs for more of this stuff published on the VS specs site here. My goal is for us to publish one spec every week or two. We've got two up there now and we working on more. I'm expecting that most of the Orcas functionality will start showing up in CTPs in the Feb timeframe.