I did a Bing search to see if there was an authoritative source to answer this and found that you asked this question on this forum back in June 2010. You are now the authoritative source, I guess.
Do you personally support a 7-pound 10-ounce boy and a 5-foot 10-inch man (minus the commas and three hyphens)? Or would you opt for three ugly hyphens, as in a 7-pound-10-ounce boy and a 5-foot-10-inch man?
Really interested in your spin on this one. The Chicago Manual of Style uses 5 feet 4 inches (no commas) as an example, but that's all they proffer. That said, based on logic, I'd say that the adjectival variants would be punctuated thusly: