I thought that, too. His size had me thinking Beagle, tho. He doesn't look too puppish- more like most of his growing is done. Then again, on the size thing- one of the dog's across the road is a Lab/Brittany mix and about that size (a little heavier), so maybe he is Lab/Aussie.
My aunt's dog looks vaguely similar, but with much less spots. He's an Aussie Shephard mixed with something else (which I can't recall at this moment). Very familiar. I'd say definitely some Aussie in there. Definitely a beauty!
Yeah, I don't think I see any JRT in him. When I first saw him something about him said aussie. I just can't figure out what else he might be mixed with.