Myskina / Dementieva
If they are playing Doubles, their chances of going far are good, Probably not the "best" team out there, but with the likes of Dementieva who plays Doubles Regulary, will had a little fluency.
Zheng / Li
They have a good Chinese pairing of Li/Sun who plays extremely well and goes far in the tournaments, Could be a darkhorse IMO
Strong Team, Played on Hardcourts, defintly a threat.
Kuznetsova / Likhovtseva
Perhaps strongest team out there, have played numerously this year, Great Results, and considering most other teams that triumph are of International Combinations, They should be in the running for gold.
Martinez / Ruano Pascual
Smart move by playing together, will take a little getting used to this combination between them, but Both Great Doubles Players, Noticebly Ruano Pascual. Husarova did Martinez Proud
Other (Please specify)
Both had Excellent results this year, Casanova and Bartoli produced a great young combination, and Schnyder and Schett can turn the heat on when needed, like in France earlier in the year, though I would rather have the Team of Gagliardi/Casanova, Schnyder and Casanova with their respective Doubles Rankings pose a threat, when both have great serves on the day, they can be a large threat, both great pairs of hands and a great court sence.
Lets just hope Schnyder has her Brain into 6th Gear by the time the Olympics come around.