I've not seen this before on the site, however I was at the Iowa State Fair today and saw a product that I think my solve the worry of getting stuck with a flat tire.
This tire repair kit really works, I talk to the factory guy and he gave me a demonstration and this really works. You still need to have the pump, however it will plug the hole until you can get help or a new tire.
Anyway, here is the site if your interested. Price was right, $12.00 and has a 10 year storage life.
http://tirerepairkit.com/