Another handy tidbit of geek knowledge I learned while reading Microsoft Visual Studio 2008 Unleashed... when the IntelliSense window is displayed (giving you hints on what code keywords you might want to input) you can hold the control (Ctrl) key down to make the window semi-transparent.  This is especially handy if you need to reference a line of code that is now covered by the window.

NOTE:  This is new to VS 2008; it does not work in VS 2005.

Before:

After: