Hi there, here are some new schedules of convention based Art Show in US.

Ended
– Boskone 46 (Feb. 13-15, Boston, MA)

Confirmed
– Millenicon 23 (Mar. 20-22, Cincinnati, OH)
– Conduit 19 (May 22-24, Salt Lake City, UT)
– ConQuest 40 (May 22-24, Kansas City, MO)
– BayCon (May 22-25, San Jose, CA)

Planned
– Comic-Con International (Jul. 23-26, San Diego, CA)
– Worldcon 67 (Aug. 6-10, Montreal, CANADA)
– Dragon*Con (Sep. 4-7, Atlanta, GA)
– World Fantasy Convention 2009 (Oct. 29 - Nov. 1, San Jose, CA)