BizTalk 2010

I was wondering what new features of BizTalk 2010 do you like the most? Also are they any must have tools now? I am interested in the following:

  • Automated deployment (of interfaces)
  • Automated testing (regression and functional where possible)
  • Automated configuration management (across various environments – development, various testing, pre-prod and of course prod).
  • Coordination with AppFabric?