All ideas are welcome. What do you think?
I would do it like we had the Cruiser Assistance Club on ih8mud years ago. Voluntary, very personal information (work/home/cell #s, addresses), what you could offer in assistance (shop, bed for the night, tools..), your vehicles and your level of expertise. Like I said it was completely voluntary and you had to be willing to give a great amount of personal detail but you always had a list while you were travelling of help or resources along the way.
It grew to the point of encompassing the globe. Not sure what killed it.
Just a db of callsigns doesn't really do much, and I have an app on the Droid of the ARRL db.
IMO to make it a real thing and keep commercial interests out, it would be a secured site that allowed individuals to create and edit their own entries, and export a printable list (or pdf, spreadsheet, etc).