Impressive effort you put on that. Imagine if you would have put that much effort in mining coins at that time. Hopefully you did by the way.
Royse777 - yes, you would have to trust me to use the address, that's a given. Similar to early Casascius coins, I suppose. Could still be used to sign messages if you didn't want to send any BTC to the address!
Signing a message is all what I see the use of it other than that there are not any (much) use.