Web 2.0 Tools - BaseCamp

I should have picked games. But instead I selected Basecamp, a Business, Money and eCommerce tool. Project management. Overall very impressive. Free and online, but some tools are only available in the paid subscription plans, such as time tracking. Great for to do lists and collaborative task overviews. It looks fairly simple and straightforward. No Gannt charts, but who needs 'em? We are using our Wiki for SSP, I would like to compare the capabilities of this tool to that. Project management is a tricky thing, some are too simple, some have too much. I wonder if this might be the one that's "just right"?