I got this working using the following:
1. Download the .kmz file.
2. Go to Google Maps, and if you haven't yet, create a "My Maps" personal maps listing.
3. Create a new "My Map"
4. When creating the map, select "Import" and upload that KMZ file. (Important: Mark the map as Unlisted instead of Public, since I'm rather sure the Roadfood.com people don't want that paid-access data listed out for the general public
5. On the iPad, go into layers and select "My Maps" and select the RoadFood map you just created.
That should work, although the data is online and not offline (if you don't have Wifi or 3G access on your iPad, you won't be able to view that layer).
(If the RoadFood powers object to this, I'll pull my Unlisted map as well)
post edited by MikeS. - 2010/07/19 19:22:57