is there any way to purchase larger size prints of some of the work here? my favorites gallery is looking really good and there are some pieces i'd like to hang.

It's totally up the the artists that created the work whether or not they have larger resolution versions. I'd say that in most cases however, the images won't be large enough to create a decent print. The largest you can print out a 1600x1200 images (at about 200px/inch) is 8x6". That's hardly poster size.

For a comparison, the 24"x18" poster that I created was made at 7200x5400 pixels.