http://www.lgactionsports.com/2006/events/asc/
This has been going on all over the world with the FINALS being held in Dallas! Don't have a clue about photographic restrictions, could not find a thing on the site, but for $15 just going might be fun since you are seeing some of the best in the world do their skate thing along with the BMX and other activities.
2 of the local TV stations had the ranking womens inline champion from Brazil on this morning, very cute looking lady but she can do some mean moves on the pike, and one station had a local boy Mr Eisenburg (yeah the skate park Eisenburg) on their segment.
So if anyone is really into this they may want to call Reunion or contact Tony Fay at The Sports Group at (214) 631-7702. (If you have credentials they have a way to get them to them at
http://www.lgactionsports.com/press/ ).
After reading the above it looks like you may be able to take a P+S out there but not pro DSLR unless you have the credentials since they have all sorts of Television coverage og the events that are being broadcast world wide.