Chad (caeman) from Ohio has been running an internet-blowgun
tournament for the past three months now.
Details can be found on the Blowguns NW Yahoo group:
http://groups.yahoo.com/group/blowgunsnw/

We've been using various style target faces, placement, distances, and
stances. Really mixing it up, and making it interesting. Shooting is
on the honor system - no need for witnesses. Free downloadable target
faces of different types. Very enjoyable.

We hope that you'll participate.