And yet another i had no idea you could do this until someone showed me.  By having just the Icon View, you can save a lot of space within the Toolbox.

For each toolbox grouping, you can customize whether to show the flat list of controls and their names or just show their icons.  Right-click anywhere in the desired group, and uncheck List View.

Icon View:

List Item View (Default):

Technorati Tags: VS2005Tip,VS2008Tip