Dom - I'm in Pembroke MA. Guess it's bad timing to find your post from last summer now that it's Thanksgiving... If you're still in area, I frequently ride along route 3A, route 105, the cape, and Miles Standish forest. Sucks that we've got a 4 to 5 month wait until spring.
I'm in Whitman currently-actually went to High School in Holbrook! I'd bee down for meeting up with people in the area that ride shadows. I'll check back soon to see. Have to agree that parts of 3A are great and rt. 105 has to be one of the best stretches of road in the state.