I grew up with a "tripod" dog. I guess somebody forgot to tell him he was gimped. Had some GS in him, from the colour and the attitude. He could clear a page-wire fence as tall as he was, no problem, and loved it. Don't sell a tripod short: what they lack in paws, they make up for in heart.
Definitely true. People all over the neighborhood know her, but no one knows my wife or I. She is quite the snuggle dog, unless you're a kid, then she's not real great. In fact, she's had the hair go up a couple times on kids and I've had to pull her back before she snapped. I worry a LOT when the neighborhood kids try and flock her. She also nipped our next door neighbor kid once, though he was taking a toy out of her mouth. I pulled just in time that it was a light graze, and mom was surprisingly calm about it. (thank God).
She gets along pretty well - being the front leg, it's a bit more problematic than a back leg. The vet told us the front legs hold about 70% of the body weight, so you can imagine how difficult that gets, plus her head bobs up and down pretty good at low speed. She levels out nicely at about a trot. I also worry that she'll sprain that ankle (wrist?) and be SOL one day.
She had a chondrosarcoma in the left shoulder blade. By the time we got her to a vet it had taken up enough that they couldn't just take the tumor out. Since the shoulder blade had to come out, there was no where for the humerus or attached muscles to attach, hence the leg coming off.