Just as they debuted their most promising exhibit to date, Congress Avenue's Volitant Gallery yesterday announced plans to shutter its doors at the end of the month. "At this point it appears Volitant Gallery will be losing its lease by October 31, 2007," wrote Volitant Gallery Director Xochi Solis. "Sean [Gaulager, Volitant's assistant director] and I are excited to begin new and fresh challenges that will continue our personal missions for art education and growth......