I have been doing some research into after-market navigation since the option won't be available until late this year. I found the Pioneer AVIC-D1. It is Double DIN which should fit well in the H3. It has Navi, XM, a rear view camera option, touchscreen, AM/FM, and a two CD players one for the Navi DVD, and one for regular CD's (The Navi DVD will not play movies sorry). So far this is the only system with all the options. Price ranges from $1299-1800. Who else was planning to get the after-market navi? I'm not sure how natural it will look with the silver center console in the H3 though.
check it out:
http://www.pioneerelectronics.com/pna/product/detail/0,...51_218219118,00.html