I'm waiting for this to be announced, as well - I'll probably check on it when I go in for my 1st oil change in a few weeks. Saw someone mention on another board (?) that Honda's going to announce a retrofit kit.
I'll guess that it's going to cost at least a couple hundred bucks - you've got the tire / wheel, the mounting bolt & adapter flange, & a new tool tray (the existing won't fit with the tire installed. Add in some markup, and I'm thinking $200.
Oh, well...at least the air compressor may still come in handy...
