Since you already have your team on gmail I would suggest this: 1. Add Tasks from Google Labs to everyone's gmail account 2. Add same to Google Sites (you can

Since you already have your team on gmail I would suggest this: 1. Add Tasks from Google Labs to everyone's gmail account 2. Add same to Google Sites (you can insert gadgets into pages, just make sure you add Google Labs Tasks and not other task apps also from google) What I really like about this setup is the ability to create tasks from emails with 1 click, so you can keep track of the whole conversation from the individual task itself. It's not the prettiest setup but it does have the ability to share conversations, create multiple projects and structure tasks hierarchically - which to me is all you need. And hey, it's free and builds on what you already have.