I just signed up for this website, ajaxWindows another webos - seems pretty impressive so far. I just saw the slashdot posting on it.
the cons - mainly security, may not be available from "every" machine I touch.
the pros - a quick way to be able to browse the web and save notes on most machines I touch.
Here is the YouTube video demo of the site/service
they also recommend and let you open a gmail account for online storage, cool.