Voo2do is a very cool web-based time management spreadsheet, also known as a to do list. It's more than that, while it doesn't have all the yummy features of something like Backpack, there's something to be said for simplicity. Most important, Voo2do added some features, like the ability to edit notes, and a nascent support for group work too. For those of you wanting more, Voo2do also has an API.