Here is one of my favorite online providers of professional online collabrative tools and services. As well as providing a decent email service (similar to Google Mail) Zoho has a huge product range. Does your business need a project management website? Zoho is the place for you! These people seem incredibly prolific in their plugins and applications I really recommend you try them. We use the at work for Project Management and the service has been great and scaleable so that we can keep costs down.
P.S. Did I say that I am now a proud father? My daughter was born this week, perhaps I’ll do a look at some special baby related gadgets, gizmos and software to make our lives easier (I’m aware this may stray from the Geography/planning/ urban design elements of this blog, nevermind)