I was passing Martin's on my way home, so I called in to see if through some twist of fate they actually did have some Dogfishhead somehow. No, sadly not.
This is off-topic, but I got to mention that they ended up giving me a tester of Glendalough poitin (the 40% abv in their line-up, there's also a 60% abv one and one aged in Sherry casks). Pretty good. I'd say it was so mild and drinkable that for the authentic poitin experience you'd need to step up to the 60% 'mountain strength'.