After CodePlex announced that they are supporting Mercurial, I have been seeing a lot about it on the net. In the following months I am slowly planning to switch over to Mercurial from my existing system. Below are few links that I found useful in understanding and evaluating Mercurial:
TekPub has published an introductory video on using Mercurial along with CodePlex.
Get one of the following Visual Studio plug-ins for using Mercurial as your source control system
I am also starting off with an open source project for a remote service administration requirement at the institute I work, for which details will be provided in the short future.