Here are some pics of my boy, he'll be 5 months in 2 weeks. He's been doing great and has improved amazingly in every single aspect of his behavior. The first 2 pics were taken the night we got him, the last 2 were taken yesterday.
I agree with the others that although he seems to have Basenji in him - his head is def. not Basenji.
As for the leg I'd have it amputated if it troubles him - He'll cope with 3 legs I'm sure, but certainly consult a specialist first. Please keep us updated.