I can confirm that this works well on Beta 13.
Using with Telstra (Bigpond) NextG. (A 3G 850MHz network)
Settings used were
APN – telstra.internet
Dial String – *99#
Optional AT String – AT+CPIN=xxxx
where xxxx is the 4 digit pin code.
I can also confirm that the Telstra Elite modem (Qualcomm Sierra Wireless USB 308) does not work.
Regards,
Phil