Here's something not usually found in the States -- a non-SCA medieval group. Weorod is a nifty group - here's a description from their site:
Weorod are a small, independent Historical Re-Enactment and Living History group based in Southern Hampshire. Although a new group, we are formed around a nucleus of seasoned re-enactors from other societies with over 6 years experience gained whilst working with organisers of both large multi period events and small shows. We normally commit to around six weekend events throughout the season allowing us to maintain a healthy balance between group training sessions and shows. This enables us to always give our best.
The site is beautiful and well-written. I suggest a bookmark if you're looking for a well-designed site.