I was recently turned on to this collaboration solution by a colleague, I was using Basecamp before, and I have to say that I don’t miss Basecamp a bit.  There’s no affiliation, I am just a happy user and suggest to most of my clients that we work with Airset.com to keep us organized and on task.  There is a main screen which you can customize for each project with readers, personalized messages, and any number of widgets.  There is a calendar, blog feature, lists, and messaging feature.  Document sharing / storage is also included.  There really isn’t much that I need that it doesn’t provide, the only thing that would be nice is if this document sharing could allow for real time changes, so that downloading and uploading new versions of the flyer or whatever I’m working on.  All in all, an excellent application, check it out for yourself, there’s a free version… http://www.Airset.com

All the best~
Christine