Am I the only one who thinks the discussion should be about which sports to cut, rather than what to add? The costs of the games, summer especially, are ballooning out of control. If a sport or event doesn't require new facilities, or can share facilities with another event, then by all means, go for it. But so many events just seem to cost more than they're worth (BMX, canoe slalom, etc)
(Then again, if I were in charge, it'd be a bloodbath. No more trampoline, sailboarding, men's soccer, boxing...so maybe it's just me)