sheesh guys, i would suppose having over 6,000 posts and no memories of false information would be enough, right?
The latest Vendor.xml file has the following for the 0x04000905 (aka 7100i) handheld, under Nextel's section. There are also 188.8.131.52xx versions from NTT DoCoMo in Japan and KT PowerTel in South Korea, although I've had no luck finding the respective software downloads (not sure if the handhelds are even available over there yet; and I can't read Japanese or Korean, so navigating thier websites is impossible).
<vendor id="0x67" Name="Nextel">
<bundle id="System" version="184.108.40.206">
<bundle id="System" version="220.127.116.110">
Let me rephrase my original post, though... the software will be ATLEAST 18.104.22.1680 (package version). Also, you should place an emphasis on the 'maybe' word in the original post - no guarantees on the ringtones (although newer themes, such as the Today and Zen themes will be supported).