Backpack is 37 Signals' new online personal information manager (PIM)

From the people who brought you Basecamp, here’s a new web-based tool for personal information management, to do lists, organizer: Backpack

Gather your ideas, to-dos, notes, photos and files online. Set email and mobile reminders so you don’t forget the little things. Easily collaborate with others.

No data lock-in, that’s a plus. I want to try this. Right now I’m pretty comfortable with my VoodooPad desktop wiki, but that’s not web-enabled (at least not in a way that’s practical for me), so this seems worth a try.