Ok, have to post my chapter's prediction for the series finale:
joey get offered an acting job in california. ross and rachel get married, and monica is pregnant, and goes into labor during hte wedding ceremony. everyone rushes to the hopsital, where monica has her baby, and ross and rachel finish the marriage ceremony with joey officiating. joey then has to tell them all that he is accepting the job in Cal. and phoebe announces her engagement to the cute hospital guy.
Sorry, for the long explanation.....you can't phrase that perdiction in one sentence or less