LastPass is loaded with awesome sauce. I stumbled across LP maybe four months ago, and after a few weeks uninstalled AI Roboform which I had used for years. The software is still a bit raw, but the developers are *very* responsive on their forums, to the point that I've seen suggestions implemented within a day or two. Can't wait to see where this one goes.
Dropbox is an old standby, use this one daily.
As for Xmarks… I too was a longtime Foxmarks user, but privacy concerns since the swithover to Xmarks has driven me to Mozilla's Weave. For those of you that aren't familiar, I highly recommend checking it out… they have a very ambitious scope for the project.