Via Digg...

I placed a TinyURL bookmarklet on my shorcut bar in firefox about a year ago, and I use it on a daily basis - works great for shortening long links. When I saw a story posted on Digg today about ten Must-Have Bookmarklets, I was quite interested. They have some great bookmarklets listed - I'll probably get most use out of the Acronym finder and the Wikipedia lookup bookmarklets.