is there any racing going on on the east coast of the US?
Not sure about the Virginia area. There is very active racing in Division 11 (PA, NJ, DE, MD) if you're willing to make the drive.
I would check on the hca-na.org site to see if you can get in contact with someone from Division 9 (which includes virginia). There is no direct contact listed which leads me to believe there isn't much HCA sanctioned racing going on in your neck of the woods (might have to race handicaped in a mixed cat fleet). You can also check the schedules listed on catsailor.com as they list all catamaran events, not just HCA races.