From StarWars.com:
Attention all artists -- representatives from Lucasfilm Licensing and Lucasfilm Animation will be in attendance at Comic-Con International to review portfolios. This could be your big chance to enter the professional world of Star Wars art. See the schedule below, but please be aware that last-minute schedule adjustments are always a possibility at Comic-Con...

Thursday, July 23, 11 AM - 3 PM (PR A)
Killian Plunkett, Lead Designer, Lucasfilm Animation
Lucasfilm Animation will review portfolios of concept designers/artists, including character concepts, as well as environment concepts.

Saturday, July 25, 3 PM - 7 PM (PR D)
Sunday, July 26, 11 AM - 2 PM (PR D)
Troy Alders, Art Director, Lucasfilm Licensing

Troy Alders, art director at Lucas Licensing, will conduct portfolio reviews, provide critiques and offer tips for aspiring artists. Bring in a portfolio selection of your best work and see if you have what it takes to create art for the ever expanding Lucasfilm galaxy.."

Also, check out this interview with Troy Alders, the Art Director at Lucas Licensing, which offers some portfolio review tips for aspiring Star Wars artists.