I can report that I 'screwed up' my mpg portion when I 'rebooted' a few days ago - like you, I did retain the total miles, range, E/T, and...history, thank goodness
And to concur with the other poster, Xcel and myself both observe the TC's mpg as about 1.5 - 2gal optimistic (1.5 is usual; 2 is rare). I thought it had something to do with the built-in error factor (DoD requires it to be no more accurate than 12', and the device is sometimes several
hundred feet off, with a destination (normal, per the manual). My theory was that this would be exacerbated with each re-init of the Navi (ie; each time you start the car and boot up the system), but Xcel reported the same variance, and his average trip length is about 2.5x longer than mine. Back to the drawing board
The MMC in Sept / Oct *may* include MP3 audio capabilities (costs about .10 to include in a deck); I'd be *very* surprised to see DVD-Audio or -Video (the first, because it differentiates the TL, and the second for legal reasons, not to mention that Honda makes a RES for the Accord as a dealer-installed accessory - not that I'd ever want them to tear my car apart to install it - but I digress). There *are* people who have hacked the Navi to play DVD-Video, I believe (?) - if you're interested, you should be able to find out about it on the other Accord forums.
(an aside to Xcel - I *did* snap a good pic of the last history that you wanted, and will send your way soon. Still have a ways to go on the current tank
