Chess on Twitter: ChessTweets, the never-ending saga

The game that I've been playing on Twitter continues. My poor opponent has been waiting a few days for me to move. Basically the position has started to get trickier - I'm not sure who stands better, if I've over-extended my position and what I thought was a forcing pawn centre is about to collapse. This is the current position, black to move:

I've looked at a number of moves for black and rejected them:
...d4 [fxe4]
...Ned6
...Bd4+
...Be5
which leaves me with ...cxb with the possible (I mean optimistic continuation) cxd Qxd5; Rbd1 QxN

Mostly I worry that the collapsing pawn centre will bring the g2 bishop to life  pinning the knight on b7.

If I had two moves I'd be happy. Like after a foul shot in pool.

You can download the PGN here: http://chesstweets.com/games/pgn/2051 and see the game on ChessTweets.