PLoS Journal Impact Factors for 2006 were released in June 
2007 and several journals did well.

PLoS Biology, 14.1 (still top of the biology category) 
PLoS Medicine, 13.8 (a tremendous increase from last year's 
8.4) 
PLoS Computational Biology 4.9 (top of the Mathematical and 
Computational Biology category) 
PLoS Genetics, 7.7 
PLoS Pathogens, 6.0