1. d4 d5 2. c4 e5!?
Firstly, I will say outright that I too think the Albin Countergambit is not completely sound, but I definitely think it is difficult to take advantage of it at a sub-master level. It is usually quite tactical, and as with most gambits, focuses on superior development and attacking in place of the single pawn. I rotate between it and the Queen's Gambit Accepted fairly evenly.
Here are a few of my games here on RHP using it:
Game 4508226 -- An interesting game that showed the price for greed.
Game 4655555 -- A far from perfect game from both players, but still quite interesting nonetheless. Most likely completely unsound for black. (Note -- ceders messaged me towards the end of the game intending to resign; he didn't actually fall for the checkmate there.)
Game 5056232 --
In Progress -- I thought I would try an early f7-f6, as reccommended by some Albin advocates, in an attempt to speed development and exchange off white's further-developed pawn.
In addition, there are also quite a few nice websites that offer quite a bit of nice information about the Albin, but the two below encompass them all, in addition to offering separate analyses. Definitely worth a look.
http://www.kenilworthchessclub.org/kenilworthian/2005/10/albin-counter-gambit-bibliography.html
http://www.kenilworthchessclub.org/games/java/summer05/albin-nge7.htm