Surprised no one has mentioned Sam Adams Utopia....

http://www.samueladams.com/world_of_beer.aspx

with 25% alcohol......it tastes like a cognac more than beer

Sells for about $100 a bottle but is virtually unavailable....bottled in 2003, none made in 2004, but they do expect to make it again in 2005.

Had some last week at the Party For the Senses Food and Wine Festival in Epcot.