Dug this up on Entertainment Weekly - thought it might be of interest, particularly seeing as it has some quotes from Kauffman and Crane (however vague) about R&R...
How ''Friends'' recruited Reese
What's Reese Witherspoon doing on ''Friends'' Thursday night? Other than playing Rachel's spoiled sister who makes a play for Ross (she also appears in next week's episode), she's kicking off February sweeps, the ratings period when shows parade out their highest-profile guest stars to stop channel surfers mid-switch. The part of Jennifer Aniston's sis wasn't necessarily written for a star, but when Witherspoon said she was interested -- ta da! -- instant sweeps stunt! ''We were obviously big fans of her,'' says ''Friends'' cocreator and executive producer David Crane. ''Anybody who saw her in 'Election' would just say, 'Oh my God, yes, get her!''' Plus, the jealousy this familial flirtation with Ross arouses in Rachel rekindles ''Friends'' fans' undying hope that the couple will reunite, although the creators aren't giving anything away. Viewers' interest in those two ''is obsessive,'' says Crane's partner, Marta Kauffman. ''I have to say, my rabbi has on occasion asked me about it.''
Tina