Earlier today I came across an article on Lifehacker about Inbox2 Desktop. The Inbox2 is a system that combines all your message into a single, synchronized application that is accessible everywhere. The  email platform allows you to add your existing email accounts (Gmail, Yahoo, Hotmail, Exchange) or any custom IMAP/POP3 accounts and social networks (Facebook, LinkedIn, Hyves, Yammer, Twitter) in one application.

After reading this article, I am interested in the system. I will setup an account and see if I like it. Once I know more I will give it a review.