Every year, a little more energy hums around this two-week performance party (four shows, two weeks, 16 acts) because it keeps getting better and better. The early show: Joe von Appen (a one-man flipbook who begins by directly wooing the front row: "I'm a mammal and I'm looking for something three-dimensional to call my own"), tEEth (tableaux, karaoke, angry stripping), and more. The late show: maika misumi (martial-arts dance), Implied Violence (punks, dandies, and German expressionism), the mellifluous marimba of Erin Jorgensen, and more. I can't wait. (On the Boards, 100 W Roy St, 217-9888. 5 and 8 pm, $14.)