
Yes and no...
...they had a browser plugin tat let you do pretty much anything in a web page you could do with a normal app. However, they limited it to Windows as, at teh time, that was pretty much all they felt they needed to cover; they never got much pressure to support other platforms.
VisualWorks has something very similar as well; it came out probably a year ago
Jay O'Connor
"Going places unmapped
to do things unplanned
to people unsuspecting"