Go to the main lobby in Fulltilt...click on "requests" then "find a player" then type in the name you're looking for...it shows what tables they're playing on...double click the table or just click "open"
just look at the highest staked tables of each game or tables with red font. the best players play there atleast a few times a weak. The red font cash game tables mean there is a Ful Tilt pro sitting there