It looks like Topalov used one of Graham's lines in a recent Wijk game--see the following from ChessOk:

[White "Navara"]
[Black "Topalov"]
[WhiteElo "2712"]
[BlackElo "2770"]
[Result "1/2-1/2"]
[GameID "325"]
[LastMoves "31.Rb2 Rxd3 +0.16"]
[Stamp "706"]

1.c4 e5 2.g3 Nf6 3.Bg2 d5 4.cxd5 Nxd5 5.Nc3 Nb6 6.Nf3 Nc6 7.O-O
Be7 8.a3 O-O 9.b4 Be6 10.Rb1 f6 11.d3 Nd4 12.Nxd4 exd4 13.Ne4
Bd5 14.Bb2 f5 15.Nd2 Bxg2 16.Kxg2 Kh8 17.Nf3 Bf6 18.Qc2 {$503}
{$292} { 19.Qc5} ( 18.Rc1 Qd7 19.Qb3 Rae8 20.Rc2 f4 21.b5
fxg3 22.hxg3 Nd5 {...1-0, Azmaiparashvili Zurab 2575  - Chandler Murray G 2585 , London 1989 It (open) "Lloyds Bank"}
) ( 18.Qb3 Qd7 19.Rfc1 Rae8 20.Rc2 g5 21.Rbc1 g4 22.Ne1 c6 {...1/2-1/2, Barrance John - Banks Graham, New Zealand 1993 Ch New Zealand (b)}
) ( 18.a4 a5 19.b5 Re8 20.Re1 c5 21.bxc6 bxc6 22.e3 dxe3 {...1/2-1/2, Navara David 2633  - Karjakin Sergey 2730 , Sochi  2. 8.2008 It (cat.19)}
) Qd7 19.Rfc1 c6 {$238} 20.a4 f4 {$292} { 21...Nd5} 21.b5
cxb5 22.axb5 {-0.28} ( 22.Qc7 Qe8 23.axb5 Qxe2 24.Qxf4 {+0.00} )
Nd5 23.Nxd4 Rae8 {+0.00} ( 23...Qg4 24.Qb3 Rad8 25.Nf3 {-0.27} )
24.Nf3 Bxb2 {+0.49} ( 24...fxg3 25.hxg3 Nf4+ 26.gxf4 Qg4+
27.Kh1 Qh5+ 28.Kg2 Qg4+ {+0.00} ) 25.Qxb2 Qe6 26.Qd4 {+0.31}
( 26.Rc5 {+0.29} ) fxg3 27.hxg3 Qxe2 28.Qxd5 Re3 29.Re1 {$261}
Qxf3+ 30.Qxf3 Rexf3 31.Rb2 Rxd3 32.Z0 ( 32.Re7 Rdf3 33.Rd2 h6
34.Rxb7 R3f7 35.Rxf7 Rxf7 36.g4 Kh7 37.Kg3 Rc7 38.f4 Rc5 39.Rb2
Kg6 40.Kf3 Rc3+ 41.Ke4 Rc4+ 42.Ke5 Rc5+ 43.Ke6 Rc1 44.Rd2 Re1+
45.Kd6 Kf6 {Houdini Aquarium (0:00:01)} {<font color="red">+0.16|d23</font>}
{$11} )  1/2-1/2

Pretty cool, eh?