dont forget venus did pretty well last clay season so they can dominate on clay (venus can anyway) if they really get in form. but agree surfaces dont mean much in womens tennis, at least not with the best players (top 10/15). lower down the ranks i think there are more specialists though.
Go the aussies! stosur!!!
and good luck russians: dementieva, safina, kirilenko, sharapova, kuznetsova, bovina, zvonareva, dushevina.
also good luck to: azarenka, lucic, sprem, vakulenko, vaidisova, safarova, ivanovic, groenefeld, mirza, krajicek, kvitkova, larcher de brito, lisicki.