Update:
OK, the unit does allow the altering of the A/F ratio. If you into special functions (same place as idle increase and timing advance) menu and select wideband sensor (3rd item), you can choose A or B. A is the default.
A:12.5 A/F ratio average. Can go up to 18.6 for short periods.
B:14.7 A/F ratio average. Can go up to 30 for short periods.
This is a definitely increase in power (obviously) if you choose B. I didn't see intake or coolant temperatures to increase when I had it on B (drove for like 30 minutes). I'm not sure I want to keep it on B all the time since wikipedia scares me away:
http://en.wikipedia.org/wiki/Af_ratio
That said, it's nice to have the option to kick the engine into high gear for short track runs or whatever. I'm pretty sure (but not positive) that if the coolant and intake temps are not getting too high, then there's little risk (plus there's a knock sensor which should prevent damage anyway. As far as whether this is 100% safe even with the knock sensor I'm not positive).
I did try out the update (files linked on this site). It does advance the minor version, though I didn't see any new menu items. I reprogrammed just in case they tweaked anything (drives real nice, wouldn't recommend against updating).
Oh, and I have a 2007 but wasn't sure if it was before or after 2007.5. Good news is if you choose the wrong one from the vehicle selection menu, it will tell you, and you can just choose the right one afterwards.