Dog Skate Park
As far as I know, Somerville does not have a skatepark.
Skateboarders are invited to join forces with Somerville dog owners in the interest of creating a dog skate park. Admittedly the constituency of potential users for a dog skate park is one, and he lives, not surprisingly, in Huntington Beach, California.
I'm ashamed to admit that Tyson, the Skateboarding Bulldog, has better control of his board than I ever did. In my defense, my board was a yellow plastic "Banana Board."
Skateboarding Bulldog via Boston Pooch*
*UPDATE 22 February 2006: The Boston Pooch site is, alas, defunct.