While it’s not in Austin proper, the Angel Springs Event Center might be good (http://www.angelspringsevents.com) and I (Steven/Doc) know the owners.
St. Edward’s Professional Eduction Center (http://www.pec.stedwards.edu) – I (Steven/Doc) have been to several events there, and know the manager - they might also want to sponsor, as they have a photography program, and their students might want to be involved
The Art Institute of Austin (http://www.artinstitutes.edu/austin) – they might also want to sponsor, as they have a photography program, and their students might want to be involved
Austin Community College (http://www.austincc.edu/photo) – (from Jen) - Their photography program is based at the Northridge campus. I just finished the Fundamentals and Digital Imaging I with their program, and there are a LOT of spectacular photographers in that program!
Please add your suggestions as comments, and please add comments about the venues.