Definetly, XMARKS! =/ Plus OFFICIAL greasedmonkey! THAT WOULD MAKE A REVOLUTION on Google chrome!
Ditto on both, especially an official, working Greasemonkey.
Nerfpl: I've also been waiting for one of my favorite extensions, CoolIris to come to Chrome - it has - Just received word from the developers a few weeks ago and have been running it ever since! For those who've heard of it, or even if you haven't, take a look @
http://www.cooliris.com/beta/chrome/ <- AWESOME!