Losing on the wrong end of the Sicilian

This is my latest loss to Fritz on the iPhone. It starts well (up to move 8 maybe) but goes down hill fast after that. the thing about playing good players (and computers) is that they punish small mistakes. I'll have a look at the game tonight on a board and maybe add some notes.

[Event "Game Without Clock"]
[Site "Fritz Chess for iPhone/iPod Touch"]
[Date "2010.08.26"]
[Round "?"]
[White "Fritz"]
[Black "Player"]
[Result "1-0"]

1.e4 c5
2.Nf3 e6
3.d4 cxd4
4.Nxd4 a6
5.c4 Qc7
This is what I've decided to play as black against e4, the Kan Sicilian (also sometimes known as the Paulsen or Taimanov. I'm not sure if the last is strictly correct as many writers talk about the Taimanov's key move as an early ...Nc6).
6.Nc3 Nc6
7.Nxc6 dxc6
8.Bg5 Bc5
9.Qd2 f6
10.Bh4 Ne7
11.Bg3 e5
12.Na4 Ba7
13.Be2 O-O
14.Rd1 b5
15.cxb5 cxb5
16.Nc3 Bb7
17.Qd7 Rac8
18.Qe6+ Rf7
19.Rd7 Qc5
20.Rxb7 b4
21.Rxe7 Qxe7 1-0