Stumbleupon now allows you to change your stumble blog from a list to a grid. It takes a screen cap if the pages you have stumbled and makes a very cool grid. Here is a screen cap of my own blog which you can find here.

Stumbleupon Grid thumb

A lot of changes to websites such as SU can turn out to be mere frippery. Time will tell, but I think this option is going to be useful.