Even if version 2 (true it's still a beta) supports userscripts, I don't think there are any valuable Chrome addons released yet. If anyone knows some addons that might be useful please post here and I'll test them too. In the meantime, I've found:
- Portable Chrome. This addon does what it says, meaning it lets you use Google Chrome on a usb drive as a portable application. If you think about it is not really an addon, as this guy used Auto-It to create this portable version based on the sources available for Chromium.
- Greasemetal. This is a userscript runtime for Google Chrome. Actually once installed, this will launch Google Chrome and also create a userjs folder in your My Documents ... folder. In that folder you would load userscripts downloaded from http://userscripts.org/ and by launching Google Chrome through Greasemetal any userscripts loaded will act as Chrome addons. However, I've tested this with Chrome version 2 and it doesn't work, I'm still trying to figure out what I'm doing wrong.