Lecture notes
Lecture notes were taken by three different scribes:
notes version 1,
notes version 2, or
notes version 3.
References
Recent articles:

Grisha Perelman, The entropy formula for the Ricci flow and its geometric
applications, math.DG/0211159.

Grisha Perelman, Ricci flow with surgery on threemanifolds, math.DG/0303109.

Grisha Perelman, Finite extinction time for the solutions to the Ricci flow on
certain threemanifolds, math.DG/0307245.

HuaiDong Cao and XiPing Zhu, A complete proof of the Poincaré and
geometrization conjecturesapplication of the HamiltonPerelman theory of
the Ricci flow, Asian J. Math.
10 (2006), no. 2, 165492.

John W. Morgan and Gang Tian, Ricci Flow and the Poincare
Conjecture, math.DG/0607607.
Some surveys:

William P. Thurston, Threedimensional manifolds, Kleinian groups and
hyperbolic geometry, Bull. Amer. Math. Soc. (N.S.) 6 (1982),
no. 3, 357381.

Peter Scott, The geometries of $3$manifolds, Bull. London Math. Soc.
15 (1983), no. 5, 401487.

HuaiDong Cao and Bennett Chow, Recent developments on the Ricci flow,
Bull. Amer. Math. Soc. (N.S.) 36 (1999), no. 1, 5974.

John Milnor, Towards the Poincaré conjecture and the classification
of 3manifolds, Notices Amer. Math.
Soc. 50 (2003), no. 10, 12261233.

Michael T. Anderson, Geometrization of 3manifolds via the Ricci
flow, Notices
Amer. Math. Soc. 51 (2004), no. 2, 184193.

John W. Morgan, Recent progress on the Poincaré conjecture and
the classification of 3manifolds, Bull. Amer. Math. Soc. (N.S.) 42 (2005), no. 1, 5778
(electronic).
A related physics paper:

Matthew Headrick and Toby Wiseman, Ricci flow and black holes, hepth/0606086.