If you are using Windows 7, you probably now like the fact that you can open files (like Word and Excel) by right-clicking the application on the lauch bar and select the file you want to work with. Maybe even pin them!
Sadly, that doesn't work for Visual Studio 2008.
Josh Einstein shows how to fix it with a simple registry hack that you can find from http://einsteintech.spaces.live.com/Blog/cns%2189E05724AF67A39E%21744.entry?wa=wsignin1.0&sa=708268399
Kate Gregory explains why Visual Studio 2008 has this behavior at http://www.gregcons.com/KateBlog/DoYouWishVisualStudio2008ShowedSolutionsInTheJumplist.aspx