In honor of the Metropolitan Opera's 30th anniversary on PBS, GREAT PERFORMANCES AT THE MET presents a showcase of fans' favorite televised Met moments, chosen through online voting. Voting began September 17, 2007, online at the GREAT PERFORMANCES Web site (pbs. org/gperf), where a selection of excerpts from Met telecasts spanning three decades is available for screening. Viewers are invited to cast their votes for their top 10 favorites (one time only) and will be able to rank their choices from 1 to 10. Voting ends October 12, 2007.