Well, it's time to dance with VS2010 RC. I've used VS2010 Beta 2, but I didn't happy too much because It was really slow. In this RC version, everything seems changing, on Scottgu's blog, he add some comments from audience:

• @DanWahlin: The performance improvements with Visual Studio 2010 RC compared to previous builds are huge. Really happy with what I'm seeing so far.
• @peterbromberg: VS2010 RC: I must admit, I am impressed. Major speed and performance improvements. They are obvious immediately!
• @Nick_Craver: RC performance is ridiculously faster, can't wait to switch over full time!
• @Rlz2cool: Just tried VS2010 RC. One word incredible. Super fast, great build with things I saw in earlier releases fixed. So awesome.
• @ddotterer: Trying out VS2010 RC: Snappier UI, much faster intellisense, significant build time reduction, etc. Overall: AWESOME JOB
• @tomkirbygreen: Oh my goodness, VS2010 RC is much, much faster. Kudos to the VS perf team and everyone else. Uninstalling Visual Studio 2008 :-)
• @JoshODBrown The developers on the Visual Studio 2010 RC must have had their usual beverages replaced with unicorn tears or something. #VS2010 #awesome
• @jbristowe: Holy Butterball! VS 2010 RC is crazy fast. It makes me feel like this: http://bit.ly/cPaOvE

I am having a problem with Visual Studio 2008 that only started after I had installed Office 2010. If you get this problem then there is a simple solution, well, one that worked for me. You need to run a repair on the “Microsoft Visual Studio Web Authoring Component” that is part of Office 2007.

You can find the setup in the following locations:

Windows 64bit

C:\Program Files (x86)\Common Files\microsoft shared\OFFICE12\Office Setup Controller\Setup.exe

Windows 32bit

C:\Program Files\Common Files\microsoft shared\OFFICE12\Office Setup Controller\Setup.exe

My guess is that when Office 2010 is installed it has a new version of this component that has not yet been made compatible with Visual Studio 2008…

It was a frustrating couple of hours this morning to figure it out with the bulk of the time taken up with an ineffectual repair of Visual Studio 2008 SP1, ahh well, now I know…

I found this post on Office 2010 gotcha 2: Visual Studio 2008 Locks form Martin Hinshelwood - A Scottish software developer: SSW Solution Architect & Microsoft Visual Studio ALM MVP! I really want to thank him a lot.