I have just installed and played around with VS 2008 (90 days trial). Hmm… first impression is that MS made really great tool. The VSTO are also available in professional version. I have tried testing system. It looks great and can replace NUnit from my usual practice (I’m not sure yet… but it is much easier to develop and run test from single environment). In ASP.NET projects AJAX extensions are already included but not Ajax toolkit.
I’ve got long holydays (until 9th of January), so I have time to explore new features in new IDE.