Two separate questions really, for those of you who have upgraded from 2008 to 2010:
The IntelliSense parser was completely rewritten for VS2010. The .ncb file is history. It's now a .sdf file, a SQL Server Compact dbase. It works very well on my machine, I have seen very few complaints about it. Notable is that the C++/CLI language has lost IntelliSense support due to the rewrite.