Richard Neher and I have compiled a report on recent patterns of seasonal influenza virus evolution with projections for future clade behavior. The nextflu site made putting this together really straightforward. Lots of interesting stuff going on. The 3c2.a clade is taking over H3N2 viruses, there's a new clade of H1N1pdm viruses localized in South Asia and B viruses continue to oscillate between competing clades without permanent winners.