Jellyrolls and you can get a cab at the front of the Boardwalk hotel. They will have to call one for you but definitely easy to do. Buses do run pretty late but it can take forever to get a bus to DTD then wait for the bus to your resort - you could be in for about an hour extra time by taking the bus.
If you hang out long enough to make last call there is usually a Disney Bus out front at 2am that will USUALLY take you directly to your resort. This isn't a Disney approved thing so your mileage may vary, but I have never heard of a guest taking the bus and getting dropped off anywhere but their resort at 2am.
I'm a big fan of Jellyrolls. You could have dinner at a country in Epcot and then walk over to Jellyrolls. Have fun!! (here's a video of Jellyrolls even though video taping is not allowed the place was packed and everyone was singing along http://www.youtube.com/watch?v=luzCf979wEI&sns=em Enjoy!)