Another Mobile Wi-Fi Solution

I just saw a website where you can purchase an application for your smartphone that turns you phone into a Wi-Fi hotspot, providing wi-fi service for up to 5 other wireless devices.  It is available for a $24.99 one-time fee for lifetime access.  You must have an unlimited data plan on your phone.  I see that it is not available for Verizon Wireless customers.  Sounds interesting!  Check it out at http://walkinghotspot.com/.