I use NewsGator for posting to my Community Serverblog (not Microsoft). I like having it integrated into Outlook for both aggregating feeds and posting back out. However, with the release of CS I had to develop my own plu-in. In the process I also discovered that the web service behind the MS blogs and CS blogs are different. Although I have written support into my plug-in for both, I have yet to test the MS blogs and need to find a NewsGator user with an MS blog.