If you happen to see people filming around town, and if they also seem to be in a hurry, there's a good chance they're making a film for this year's 10x10 Filmmaker Challenge, a program of the 11th Annual Sacramento Film & Music Festival.  Now in its 7th year, the 10x10 challenges filmmakers to make a 10 minute film in 10 days, on an assigned theme and using assigned elements such as quirky props and the Festival's mini-poster. Last night, filmmakers and prospective cast and crew members arrived at the Art Institute of California, Sacramento (a Festival sponsor) in enough numbers to require a move to a larger room.  In fact, the 26 teams that signed up to participate caused the maximum ru