I'm such the nerd, because I am excited about my tag cloud.
Check it out, below the "book shelf" over to the right showing the books I've read.
The Tag Cloud shows all the labels I have assigned to posts, but instead of taking tons of room lining them out in order, it's in that neat little sphere pattern. Scroll your mouse over it to make it move.
I tweaked the size, background color and text color to match my blog.
Interested? Check out the instructions here.