I upgraded to Visual Studio 2008 as soon as it came out. I was tempted to get rid of Visual Studio 2005 since VS08 had multi-targeting support and I assumed that the new Visual Studio had all the functionality of previous versions. Well, I was wrong.
For better or worse, I still have to support some Classic ASP and VBScript code, well Microsoft dropped Intellisense and color-coding for classic ASP. Recommended solution: Keep my 2.5 GB install of VS05 around for those days when you need it.
I can't believe it myself. How detrimental or hard was it to maintain even just basic syntax highlighting? Even an open source product like Notepad++ offers that. Wow.
I recently found another gotcha which I will include in another post.
UDPATE [5/12/2008]: Looks like VS08 SP1 will bring back support for classic ASP. Cool!
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Microsoft, Visual Studio, Classic ASP