List of nfc handsets available in the USA, on this page.
Brand, model, and a date if handset is announced but not available yet.
For a more user friendly list of available NFC Phones by carrier in the USA. Go there to see all NFC enabled mobile phones available at AT&T, Sprint, T-Mobile and Verizon in an AIO table. Also lists for other countries (not all ;-) ).
9900 / 9930
9350 / 9360 / 9370
Galaxy S II (NFC optional)
Galaxy Skyrocket (NFC optional)
List of all available nfc handsets worldwide. AIO overview with info about tag reading / writing, sharing, pairing and contactless payments (card emulation mode).