I have recently added an account at 500px.com to showcase my portfolio and gain some more exposure. Here fellow photographers view, rate and comment on each others work. The response in just a few days has been very good. I will be trying to post a new photo every day (the same photos as my Facebook photography page, different presentation). You will not be able to cast votes without a account, but feel free to have a look!
Go to 500px.com to view the portfolio.