Collaboration software

Webreview has an article on software for colloborative communication and development. My team of co-workers are located all over the country these days, so I rely on AIM to chat and my Handspring Visor EyeModule to capture whiteboards. EQuill has also been valuable for quickly annotating Web pages. There are a lot of good suggestions in the WebReview article, especially for those of you looking to collaborate with colleagues on the cheap.