Cartoon Brew posted a big gallery of Tron: Uprising concept art and storyboards. I took the liberty of cropping two of Alberto Mielgo's paintings into widescreen wallpapers. Here's links to the Tron art team's personal websites. And if you haven't watched the first episode yet, here it is:
(The main character is absurdly generic, Tron's face looks a little silly, computer world helicopters don't make much sense to me, and the arena choreography doesn't look quite right. But otherwise, terrific episode. It's also free in iTunes.)
*Buy Tron toys at eBay.