I appreciate all the sites people have listed above- but I personally prefer..

designoutpost.com

-Have a look around...
I am sure you will find something!

btw... ;D - I did some graphic design myself... here at http://lakshaybehl.info and http://kibbleindia.com/

[Admin- this is not a way for me to promote my site, just trying to display my "Graphic Design" skills though i outsource that now...]