Neither am I but I do know folks who write java and have demonstrated wrapped games within a browser, the player still has to download the Game but plays it thru the browser, like Runescape etc.
If multiplayer is scripted in then play becomes a bit more interesting.
I have had a quick look at OSAKit and its a tough one all right but the promises it makes are good.
Might have to buy the pro version to get it working the way I want, that is, multiple players on multiple machines.
Cant find the 'Help' files yet or even a description about it or its process...