Basecamp - Collaborative Web-based Project Management

I seem to be very 37signals-focused at the moment: I've been reading Defensive Design for the Web on my way to work, and enjoying it's no-nonsense advice in the same way that I enjoyed Steve Krug's Don't Make Me Think!. In fact, while delivering training yesterday on our intranet content management system, I realised that some of our error messaging is not really contingent enough, and will be implementing some of 37Signal's thumbs-up good practices.

Anyway, the real reason behind the posting was to express my general delight so far at Basecamp, 37Signal's web-based, hosted, project management application. This is no MS Project with Gantt charts, resource costings and the like, but is instead a very sweet, functional tool for collaboration on smaller topics. As I've only got one project at the moment, I'll admit that I've signed up for the free version, which does not offer file-uploading, for instance, but having set up a bunch of messages, a milestone, and a to-do list the other evening, I've been generally impressed at the focus on simple project management tasks. My clients haven't logged in yet, but I'm hoping that they'll see it as a useful tool. So thumbs up to 37Signals for this one - I've used "thumbs-up" twice, haven't I: repetition is a virtue among the lazy.