  SETI@home, a search for signals from extraterrestrial intelligence, has been
recording data at the Arecibo radio telescope since 1999. These data are sent
via the Internet to the personal computers of volunteers who have donated their
computers' idle time toward this search. To date, SETI@home volunteers have
detected more than 4.2 billion potential signals. While essentially all of
these potential signals are due to random noise processes, radio frequency
interference (RFI), or interference processes in the SETI@home instrumentation,
it is possible that a true extraterrestrial transmission exists within this
database. Herein we describe the process of interference removal being
implemented in the SETI@home post-processing pipeline, as well as those methods
being used to identify candidates worthy of further investigation.
