Yup I want a black on black G8 GT.
The G8 doesn't need the Navi because it's touted as a performance sedan, not a touring luxury car. As Al said, the turn by turn with OnStar will be here soon, if you really need help. Or, instead of paying several hundred for the Navi thats in the dash, pay just 250 for a dash mounted GPS. Better supported, more accurate, a lot cheaper.
G8 > 2010 Camaro
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I USED TO HAVE an 85 Camaro 305 4bbl, 90 Firebird V6, 97 Firebird V6 (10 speakers!). Despite the two family vehicles, 3 kids, wife and mortgage, I can finally realize the dream - 88 TA almost all stock... for now.
http://www.cardomain.com/id/untameddave
Wanted this -

, but ended up with this -

for free. Can't argue with free.