I'm glad to hear you are enjoying your Omnia as much as I am. After some tweaks this phone is a great multi-purpose device.
For getting rid of the threaded SMS see Item 58 in the link provided below...
http://www.samsung-omnia.org/how-to/...ichwhywhen/60/
As far as unlocked GPS, it is on the way (at least that is what Verizon is telling us) and hopefully we will see it within the next few months.