For reference: Wikipedia: Bookmarklet
To test: First, drag this link to your bookmarks toolbar. Next, visit a AskMetafilter page and click the bookmark. Finally, a little black box should show up at the top of the screen and let you sort the posts by 'best answer' or number of 'favorites'.
My question is--how can I improve this? Any other examples of great bookmarklets? Why doesn't AskMetafilter already have this capability?
I used this as a resource to build this bookmarklet.