What I would like to see happen with the Mobile Hot Spot feature is a per use payment model. Since Sprint is charging $30 a month which most people (including me) do not want to pay, how about paying $1 for a 24 hour period? So, when I want to use it, I would enable it and pay $1 for each 24 hour period of use. I think doing it this way would make a lot of money for Sprint since it would get users who don't want to pay $30 a month by getting the casual user (like me) who would use it every now and then, and the user who doesn't want to root their phone and cheat the system.
How about it Sprint? Since I pay $1 for apps, I would pay Sprint $1 per day to use Hot Spot tethering as needed.