My friend Masha Kotlyachkova, is selling her ticket for Frequency Festival in St. Poelten for 16-18/08, for 80 eu (price negotiable) including shuttle bus for the whole period.
If anyone's interested, contact with her as soon as possible in 00436804033752
Peace and Love,
@Perechnaya_M: the best way is to go by train. There are buses that take you from the festival to the train station in St.Poelten. From there trains to Vienna depart rather frequent and it takes only about 40minutes.
You can find more information here:
http://www.oebb.at/en/index.jsp -> hp of the national railway