Microsoft have just announced the realease of an open source .NET bloggining engine built using MVC. The source is availiable through CodePlex.

I for one will be taking a look to see how easy this will be to integrate with some of our projects because we currently use blogengine.net and it is an absolute pain in the arse to get running alongside other code and we seem to have constant problems getting trackbacks and pingbacks to work consistantly.