50 most bizarre social networks

Doctors, nurses and other smart people

1. Sermo
Is there a doctor in the house?
Sermo -- Latin for conversation -- is a network for US physicians. The idea is that doctors share their knowledge from the frontline of medicine, so that trends, opinions and insights are disseminated (as pictured) through the medical community faster than the traditional publishing models.

2. NurseLinkup
Carry on nurse
NurseLinkup, a social network for nurses developed by itLinkz. itLinkz has 13 networks planned, each more niche than the last, including FirefighterLinkup. Which all the ladies in the office really like the sound of.

3. ModelMayhem
Model behaviour
We Cravers see the Internet as an omnidirectional information exchange that could elevate humanity to an unprecedented plane of global equality, but we're not above using it to look at pretty ladies. Comely ladies -- and lads -- can network with photographers, agents and other lookers in the modelling industry at ModelMayhem.

4. Zivity
Beauty...
Pretty ladies can earn cash from showing off their pretty lady bits at Zivity, currently in private beta.

5. intellectConnect
...and the geeks
Sadly, clever people are often marginalised in the real world. Thanks to intellectConnect the brainboxes can get together to discuss algebraic combinatorics, thrash out the Nyquist-Shannon sampling theorem, and also ask around if anyone knows any pretty ladies.