After much blood, sweat and tears I finally got a Virtual PC Image of Windows Longhorn, Visual Studio.Net Whidbey and SQL Yukon all working together.  It is difficult to even decide where to begin!  Avalon looks really cool (except that the XAML appears to have to be compiled), Indigo is definitely going to effect my every day development, and having the CLR embedded into SQL for stored procedures is going to cut down on db development time for sure.  But I think I will test the waters a little bit with something much simpler.  I am going to create a ASP.Net provider for PostgreSQL, MySql and LDAP.  This might take a while and Rob Howard (http://weblogs.asp.net/rhoward/archive/2003/11/21/39156.aspx) already has done some work on this.  My idea is to make this an Open Source project rather than release it under a Shared Source license.