There has been some progress made, albeit requirening a hardware hack:
http://www.hackint0sh.org/forum/showthread.php?t=23454
http://www.gsm.com.vn/forum/main/sho...314#post783314
This was on an OOB 1.1.3 iPhone. It was downgraded to 1.1.2, and with the hardware hack is fully functioning (though not jailbroken).
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Mike