Latest update 0.2.0.3: New update URL (and actually the visual guide above is outdated)
What is this? This is a Mozilla Firefox extension that adds a new section in Gallery Stats that displays weighted lists of deviations (similar to tag clouds.) It's part of the deviantEXPERIENCE extension series.
In Firefox 2 and previous versions, when you click to install, a yellow bar appears. Click Edit Options, add the site to your allowed list and click to install again. In Firefox 3, you don't need to click twice.
How to use it? Go to your gallery stats (or any other public gallery stats) and click on the last tab. Use the upper right select box to pick which property is considered a deviation "weight". Version 0.2 introduced two new "impact" cloud types suggested by =beyond-frames. The impact options show you the percentage of deviants who fav'ed/commented on a deviation of all those who "viewed" it. So if you select the Impact: Favourites % Views option and a deviation has a value of ~ 20%, it means that approximately 20% of all deviants who viewed this deviation has added it to their favorites. Same applies for the comments impact-related option.
You can more information on deviantEXPERIENCE page. deviantEXPERIENCE is NOT affiliated to, supported, nor sponsored by deviantART
Also, I'm not getting any thumbs when I hover.
The small thumbs shown in stats are really random at showing up. I'll see if I can use big thumbs instead.