These should be available for pretty much everybody (if I have it, you should).
Click on your settings button and click labs to join in the fun.
I don’t think I need to explain them all – if you want to know more just click on my carefully edited screenshot.
Lifehacker has a nice little write-up [here]
The labs is open for Developers to program addons too. I hope they’re not thinking about going Ffacebook-esque aps with this, that would be kind of annoying if not monitored carefully. Not to mention the security risks.
Of course I enabled everything 🙂