The old mystery tomato

[coYote]

I'm usually pretty good about labeling my tomatoes, but this one seems to have escaped said label. In addition I can't find anything that I've ever ordered or grown that is the size and shape of this tomato (about 3inchs long and the shape of a grape tom). So if anyone has any ideas I'd love to hear them. I realize that it should be easier to identify once they mature and get more color so I'll try and post an update.