Not that I'd ever plan to give up PB! But sometimes you might want to mix things up. Here's an article from Epicurious on some good alternatives (includes tings like apple spread, almond butter and cashew butter - yum!).
Another taste test, this time from the St. Petersburg Times circa 2004. 12 peanut butters face off in this competition. Natural peanut butters fared the worst in the competition.
Who can resist a peanut butter cup? This is the official site with a list of all the currently available flavors including some special limited edition flavors.
Purveyors of some really exotic flavored peanut butters. Some examples: PB with Asian Curry, PB with Sun-Dried Tomato and PB with Rasberry White Chocolate.