According yesterday news, NFL is supported on Nokia S40 5th edition FP1 and newer.
I was browsing which phones will be interested to buy and only found ONE with the required MIME type : the Nokia 5220 XpressMusic
I browsed others phones' UAprofile and no vnd.nokia.flashlite-archive.
Perhaps Nokia will release an update for these phones...
EDIT (080922) : From Bill Perry and Biskero, it seems NFL works on more than only the 5220...so it's strange UAProfiles aren't correct.