Dogfish head's Festina Peche (or however its spelled) is actually quite sour, just to warn you. It's in the Berliner weisse tradition. The peach is definitely there, but there's a lot of sour.

If that's the beer you were referring to, that is.

I like a nice Bar Harbor Blueberry Ale from Atlantic Brewing Company in Bar Harbor, Maine.
The beer has just enough blueberry to make you think you're having some sort of blueberry confection for dessert, while still holding firm as a real beer.
Besides, what's better for a late night dessert than a beer brewed on Mount Desert Island? (it's pronounced like dessert - blame the French for the spelling).

I agree with Grant that the peach beer from Dogfish is more of a summer afternoon beer. When I go to the Dogfish Alehouse I have it before or after the food. I always have a 60 minute with my food. I do hope they find a Columbia or Baltimore County location for expansion.

I, too, tried the Well's Banana Bread Beer (whew, what a mouthfull) with trepidation. My go-to guy at the neighborhood liquor store suggested it; he rarely does me wrong, so I gave it a whirl. I was pleasantly surprised, but as Kelby points out, it's not something I'd drink at every occasion. Another fruity beer I've become enamored with as of late is Abita's Strawberry Lager. Finishes with the right amount of strawberry flavor, but none of the artificial sweetness I expected. If there's a better hot summer afternoon beer, I haven't found it.

I'm never one to turn down anything that's labeled beer, but I'm pretty sure I wouldn't expend the time and energy to go out and buy a sixer of this. While I have been occasionally surprised in the past by 'alternatively flavored' beers, read fruity ones, by and large I prefer a more traditional fare. Not sure, but maybe due to the different metabolites and alcohol congeners of the yeast from different types of sugar?