I nominate this one.  Not because Tyler Farrar won, but because of how many top shelf sprinters are there.  Stage 3, 44th Tirreno-Adriatico: Sirotti
[my edit]
1 Tyler Farrar (USA) Garmin-Slipstream                                          3.53.48  (42.6 km/h)
2 Mark Cavendish (GBr) Columbia-Highroad                                               
3 Enrico Rossi (Ita) Ceramica Flaminia-Bossini Docce                                   
4 Tom Boonen (Bel) Quick Step                                                          
5 Robbie McEwen (Aus) Katusha                                                          
6 Stuart O'Grady (Aus) Saxo Bank                                                       
7 Robert Hunter (RSA) Barloworld                                                       
8 Luca Paolini (Ita) Acqua & Sapone-Caffè Mokambo                                      
9 Thor Hushovd (Nor) Cervélo TestTeam                                                  
10 Borut Bozic (Slo) Vacansoleil                                                       
11 Yauheni Hutarovich (Blr) Française des Jeux                                         
12 Angelo Furlan (Ita) Lampre-NGC                                                      
13 Alessandro Petacchi (Ita) LPR Brakes-Farnese Vini                                   
14 Gerald Ciolek (Ger) Milram                                                          
15 Koldo Fernández (Spa) Euskaltel-Euskadi