A. rubrum of course.
I've no experience trying them as bonsai but...
http://bonsainut.com/forums/search.php?searchid=780941
I'd agree with Jim. The North Fla. subspecies is A. Rubrum "drummondii" and works a lot better than the main species.
I've run across some pretty interesting A. rubrum trunks, but they're not easy at all to handle as bonsai --- extremely long leaf internodes, stiff, upright growth habits and leaf size are all issues that ultimately made me give up on the species. It's too much of a headache and I've got more easygoing species to devote time to...
Jim Lewis has an article at Brents -Evergreen Garden works re. the red maple, check it out, he goes into depth. But being from Fla., it's probably based on the Fla. version of the tree, but I'd bet it works somewhat for the std. version.