The PGC is a non profit group promoting nerdiness and awesome. If you aren't a member of the group's facebook page please search and join if you want- I don't have anything to do with the PGC though :)
This is the 3rd annual event, registration is pretty cheap and it's just a fun day to meet fellow geeks and nerds who are active in Portland. Drinking may or not be involved towards the end ;)
If you want to register, head to http://www.pgc3.org/olympathon/
and pay your dues. If you are starting your own team then comment in here and say the # of spots you have left. It would be wise to have nerds with various talents (Physics, IT/IS, Art, Retro Gaming, etc).
Any questions on the event can be directed to the forum through the PGC page.
Again please comment in once you have signed up through their site, and if you are needing players!