Position 31 for Boomershoot 2008 will become available tomorrow morning, Tuesday February 19th, at 6:00 AM PST (I think I have my alarm set correctly this time).
Shooting benches are recommended for this position. See http://entry.boomershoot.org/#Main for pictures of the location. Assuming your fingers are fast enough you can sign up for this postion via the online entry webpage of the previous link.