http://tv.zap2it.com/news/tvnewsdaily.html?19385
In part:
LOS ANGELES (Zap2it.com) - "Rachel's pregnancy is going to change everything," asserts "Friends" producer David Crane. "As we are breaking stories down, and starting to write scripts, it's really exciting. It feels like it did when Monica and Chandler got together." [snip] ... Crane won't say when we'll learn the identity of the father, or if the season will end with yet another "Friends" wedding, but is hopeful that it won't be the show's last season.