Radio Upgrade Version 1.18 now available.
The only fixes/tweaks I am aware of over 1.15 are fixes to roaming.
I have been using for three weeks now and don't notice any difference over 1.15 par slightly better UMTS signal at home (poor coverage in my area)
NBF only download.
For those that don't know the process to update, read here http://wiki.xda-developers.com/index...name=UNI_Radio
Here is an alternate download site: http://www.megaupload.com/?d=UTNWU68C