[mojo]

As far as security this is what I was thinking have already built ...

It is definitely user name based. Also, it encrypts the serial number using a passphrase that the user provides. It is not stored in the system at all. If you don't enter it ... you (or me the developer of the software) can not access the info.

Wow, definitely some great input already. Somethings I definitely missed. Hopefully I get some time to really dig into this and add a lot of this info this or next week. I always do the functionality first and layout design last. I might be able to have a very ugly version out shortly for people to play with.