radRounds is a social network for radiologists founded by Steven Chan MD:

radRounds is a new tool for professional networking, collaboration, and learning for radiologists, industry leaders, and medical imaging professionals. This is like Sermo, LinkedIN, MySpace, Facebook, Orkut, but completely managed and created by radiologists FOR radiology! Think of radRounds as the “social network” for medical imaging..

Visit at www.radrounds.com

Health Informatics Discussion Forum

The Health Informatics Discussion Forum is a social network set up by Health Informatics lecturers and students.

We now have almost 350 members (and counting…) from all over the world and lots of interesting discussions about health informatics.

If you haven’t joined yet, you can register here, and if you are already a member, you can invite your friends and colleagues to join by clicking the ‘Invite’ link on the main menu.