According to ActiveXbox, online video game rental service RedOctane will have all of the Xbox's launch titles available for rental on November 15th at a 7-day rental price of $6.95. The story goes on to say that:

Roughly 20 game titles by various publishers will be available on November 15th and RedOctane will carry them all. Some of the biggest titles that'll be available at the Xbox launch include Halo, Oddworld: Munch's Odyssey, and NFL Fever 2002.

There's also a monthly membership plan for $16.95 that includes no late fees, no limit on the number of games per month and a 2 games at a time limit. More information is available in the ActiveXbox story and at RedOctane.