Acrobat.com

Adobe’s Acrobat.com service isn’t so much an online office suite as a set of tools that let users work collaboratively on documents online. If you want to work on spreadsheets or presentations, you’d best look elsewhere.
In fairness, there is a screen-sharing element called ConnectNow, through which a colleague can view your PC’s display – including a spreadsheet in Excel, say – but this would miss the point of using an online office suite.
Though Buzzword (the Acrobat.com word processor) works very well, we’re not at all sold on the interface: the monochromatic design and peculiar sliding menu bars might look swish but they’re darned annoying to use.