One thing I was thinking about recently (though I know that I'm not the first and that some are already working on this, like Mozilla with Bespin) is a way to h

One thing I was thinking about recently (though I know that I'm not the first and that some are already working on this, like Mozilla with Bespin) is a way to have my dev environment as a web-app, so that I can just login anywhere and find everything like I left it. I'm using Textmate and GitX and would love to have everything working the same way. I'd also like to have the service hosting the app to just test the app right there and then, the same way I'm testing locally right now. Does anything good already exist like this?