Haji Noor Deen Mi Guang Jiang makes some really out of this world calligraphy works. His stuff captures and blends strict arabic calligraphy styles with free flowing chinese calligraphy. If i had it my way i'd have his stuff all over my place, except its just a wee bit too expensive for my pocket
http://www.hajinoordeen.com/
Apart from this you can always find tons of starving artists (lots who do islamic art) on
www.deviantart.com