For teams that have things to talk about and things to do, Rule (www.rule.fm) is the cloud application that connects discussions to activity. Unlike other productivity solutions, Rule gives even the smallest work item a proper place and it's own space for sharing, connecting and collaborating.
Collaboration Streams, Projects, CRM, Documents, Task Management, Wikis, Contact Management, Sharing & Permissions, Internal Messaging, Calendar and more. More Info »
See Rule in Action: http://www.youtube.com/watch?v=AE2xou_t_X4