Simon gave a great writeup about Jesse’s Bookmarklets about a month ago. I just managed to find it today, but I am very impressed.
You’ll need mozilla to use some of them; if you aren’t using mozilla already anyway, it’s probably a good idea to at least have it installed as a secondary browser. Unfortunately, there are still a ton of brain-dead sites out there that won’t work with it.
It’s been talked about for quite some time now. Many US states have approved it. Many municipalities have also followed suit. But today, Canada officially became the first country to dispense the wacky weed to its ill.