Here's how the SP draws work...
42 men means 2 SP groups of 21 (flights would be 5-5-5-6). The top 11 ISU-ranked guys will draw to skate in the final 2 flights of the later group. Top 11 ISU-ranked men currently entered for Worlds are: Joubert, Takahashi, Buttle, Oda, Lambiel, Lysacek, Sandhu, Weir, Preaubert, Verner, Davydov.
#12-21 (draw for the rest of the later group): Ponsero, Mabee, Voronov, Lindemann, Jialiang WU, Othman, Berntsson, Lutai, Urbas, Bradley.
45 ladies means 2 SP groups of 23 (later group - flights would be 5-6-6-6) and 22 (earlier group). The top 12 ISU-ranked ladies at Worlds will draw to skate in the final 2 flights of the later group -- they are: Mao Asada, Meissner, Meier, Sokolova, Yu-Na Kim, Rochette, Nakano, Ando, E. Hughes, Poykio, Czisny, Sebestyen.
#13-23 (draw for the rest of the later group): Korpi, Kostner, Yan LIU, Gedevanishvili, Leung, Martinova, Glebova, Marchei, Joanne Carter, Hegel, Karademir.
There will be separate draws for the Men's earlier SP group of 21 (Anton Kovaleski, etc.) and Ladies' earlier SP group of 22 (includes Gimazetdinova, Tamar Katz, etc.).
Hopefully I got my math and numbers right

... corrections welcomed.