A selection of former student portfolios:

Deb Allen: http://deborahleighallen.com/
Eric Atha: http://stateofgenius.com/
Dan Barbour: http://www.aninfinitepixel.com/
Allison Bowlus: http://designedbyallison.com/
Jennifer Brown: http://jenniferbrowndesigns.com/
Paul Daugherty: http://www.pauldmedia.com/
Abby Estock: http://aesterisk.com/
Alex Hendershott: http://www.alexhendershott.com/
Christopher Kornell: http://www.christopherkornell.com/
Jason Katke: http://jasonkatke.com/
Chris Porter: http://whochrisporter.com/
Joren Rapini: http://jorenrapini.com/
Chris Shuknecht: http://www.chrisshuknecht.com/work.html