From Mozilla Links:
“Files could be handled by web services. If I am reading this correctly, this could mean you would be able to click on an attached document and open it with something like Writely or Google Documents. Or perhaps, as I asked Santa, the ability to redirect mailto: links to web email services.”
This is scheduled for likely inclusion, and could serve well to let all web services start to become as mainstream as the Microsoft Office suite.
Zone of Mr. Frosti 