This time it's javascript's intellisense. It was working fine, untill I installed the TFS Team Explorer for VS.NET 2008, intellisense for javascript stopped working, and even code coloring for javascript was gone. Javascript appeared like a block of normal black text in both external JS files and in ASPX files. After a bit of googling, I found nothing....then my friend Bilal pointed me to a blog post that had a solution for the problem. Here's the link for that blog post
http://blogs.msdn.com/webdevtools/archive/2007/07/30/workaround-for-beta-2-javascript-intellisense-and-colorization-issue.aspx
Life's good again.