These are two interesting sites that i see myself checking almost daily. Designflavr has people posting art daily, some of which is extremely interesting, some not so. Along with the art they put up, there is a bunch of tutorials on various programs which might come in handy. Check it out for yourself at www.designflavr.com.

Another site i visit alot is Design is Kinky. Always posting new things that are very interesting. Sites currently being updated but it should be back soon. Check it out designiskinky.net