If you're looking to add some fruit flavor, I'd recommend just using some extract from your LHBS. Just add it at bottling time. So very, very much easier than dealing with real fruit and so much cleaner. Most come in 4oz bottles and that should be just enough for a subtle flavor.
Primary: Apfelwein w/ fructose, Apfelwein w/sucrose
Aging: Matt's Mega Cider, Raspberry wine, Unfiltered Apple Cider
Bottled: IPA, Hefeweizen, Magic Hat #9 clone, CCA, Apfelwein, Panty Dropping Apple Cider
Kegged: Belgian White PM, Orfy's Hob Goblin