Here are a few links to celtic art and poetry. The art links have great examples of celtic knot-work and other forms of celtic art. Also check out some of the poetry that is either related to celtic mythology or are written by people of celtic origin.
Celtic Art by Aon
Art Magick
Cindy Matyi (artist)
Celtic Twilight (contains art, poetry, and other interesting stuff)
Irish Artists Foundation
Tales of Twilight (celtic poetry and stories )
