If you are in the Phila metro area, you definitely should give these two places a try:
Capone's (Norristown/Germantown Pike): excellent selection of hard to find beers and good food. All sorts of rare imports and micro/craft brews with a selection that changes frequently. The other night we had Allagash, Arcadia and Great Lakes on draught then brought home some Bells and Fantome for later. Matt (the owner) emails out the latest beers to temp you on a regular basis
The Beer Yard (Wayne): er...wow. Leave your credit card in the car to avoid temptation.