[alexchu]

Odesk isn't a place for quality artists. If you are not confident in your ability to identify professional artists from amateurs than I would not advice you to go through odesk.

conceptart.org is a good go to community to concept artists. The community here generally stride for realistically rendered artworks. However, in the recent years this website became flooded with more newcomers and students. It may take you a while to sift them through.

polycount is a good go to community for 3d production artists. There's actually a good amount on top industry professionals who are active in this forum.

Deviant art is the largest community by user count. But you're more likely to find a mix bag of talent here. If you're looking for more anime / stylized art, this would be a good place to start.

Behance is mostly concentrated with graphic designers / motion graphic artists. So you can look for UI related talent here.

A source I would recommend is CGHUB (www.cghub.com). It's now the most active community among industry professionals.

What kind of game are you making. If you provide a little more detail I may be able to help you pinpoint where to begin looking.

[ronyeh]

Thanks!

Still in the (very early) planning stages. I was thinking a board game. I like the art styles and color palettes of games like Kingdom Rush and Hero Academy.