serena would have had a chance when she won the serena-slam but not now, and justine might have had a chance had she not got ill or injured but by the time the next olympics roll around i dont see anyone being able to do it except for possibly sharapova, or someone like karatencheva or vaidisova. no one can do it with the current line up of players playing like they are atm. maybe in another 4 years a few of them will have fallen down the ranks and might not be playing as well and then there might be a chance and in my mind sharapova is the one who is in the best position atm to capitalize and do it in 4 years however she would have to win RG which would be tough and surprisngly hardcourts are tough for her also so us open may also be a problem (although i expect her to be winning big on hardcourts by then).
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.