I've been using Google Chrome since the Dev release. They don't have any add-ons yet, but they're working on adding that. It's still in beta, so many things are still being worked out. If you're on the Dev release cycles, you should have just gotten a bookmark manager. I believe that was one of the newest additions.
Yeah, the normal downloads are actually beta downloads. That's the way Google works. They release their products while still in beta form, (just like their Gmail application), and then continue to develop them based on they way people use their product. Thus, they can work out the kinks MUCH faster, since thousands of people are essentially "testing" the product, as opposed to only a handful of developers in-house.
Anyway, the dev release cycle can be found here. You just download the small program, and it switches your Beta release cycle to a Dev.
maybe google it? that's what i did. and Crazjayz i tried out gmail beta, my tutor showed me about it on a little 5 min break(once every 30 mins it is actually healthy to just let up on the work, in 5mins you don't forget much)