Out of all the portfolio showcase/ portal sites available Behance Network has to be the best. Always inspirational and quite dangerous to have poke around the site (you can loose hours if your not careful). Absolutely love this recent post of corporate stationery for German Horror Channel 13th Street by Jacques Pense at Jung von Matt agency.
Beautifully executed (no pun intended) and good on the client for obviously not being afraid to go the whole hog with the concept. Well worth checking out his portfolio on the site too, top notch.
I'm a freelance graphic designer based in the West Midlands, currently working for a variety of clients on mainly print based projects. Have a look at my portfolio site www.russelljhall.com to see some of my work.