If you are considering project management or online collaboration software, no doubt Central Desktop has come up as one of the leaders in the space. While not quite a heavy duty project management solution like @task, CD is a great collaboration tool and has the richest feature set to price ratio of any of the tools I have used. Complete with great file sharing, task management, and IM integration, it really gives you all the features you and your team need to deliver projects on time and with greater speed, while at the same time increasing team member accountability and customer satisfaction with your project.

I have just posted a very detailed Central Desktop review. I have received some feedback that it would be nice to have some screenshots and an overview of  the best features, so I added it! Its so easy to sign-up for a free trial, you can see these screens yourself, but maybe this review will be helpful for you anyway.

The detailed Central Desktop Review can be found here.

Some of the other highlights include a price overview, an online web meeting and conference feature discussion (Central Desktop does include web meetings, but at an additional cost after 30 days), and a lot of details about all the features that I think make Central Desktop a pretty compelling collaboration suite.