I hadn't logged into my Flickr account in ages, but when I did tonight, I discovered I had been contacted by a user called "frutticetum". I don't know anything about Mr. (or Ms.) frutticetum, but I really like their collection of photos, which includes a number of pretty unusual fruits—Quinces, medlars, aronia, elderberries, many more:
frutticetum's Photostream (Flickr)
While I'm at it, I might as well link to one more. Spidra Webster is an occasional commenter (and I'm hoping still a reader) around here, and she's got quite a collection of fruit images on Flickr as well:
Spidra Webster's stuff tagged with "fruit" (Flickr)