As reported previously, the U.S. trials for slalom canoe/kayak will be held April 25-27, 2008 in Charlotte, N.C.
A press release issued today describes the U.S. National Whitewater Center, where the trials will be held. It also, helpfully, describes the event for in layman's terms:
In slalom canoe/kayak racing, paddlers navigate through pairs of poles called "gates" through a course of approximately 300-meters, set-up over challenging rapids, waves, eddies and currents. If the paddler touches one of the poles or misses a gate altogether, penalty times are added to the time achieved on the run. The Olympic program includes men’s and women’s single kayak, and men’s single and double canoe.