Re: Android Rom Thread (for Rooted Android Devices)
I don't think that phone sells enough to have been rooted at this point, though I could be wrong. If it does get rooted, I would imagine you would not loose the Garmin apps (or at the least, there will be specific roms that will work with it, AND allow overclocking). At some point, I am sure this will be possible. That said, Google Maps turn by turn directions (with voice) has never failed me on my Droid, so the appeal of the Garmin app doesn't do anything for me personally.
This being your wife's phone, I would probably just leave it stock. Rooting/OCing is really only for people who want to tinker and customize their phone...
On Any Given Sunday!