There are extensions to "Namecoin", a bitcoin alternate chain, that does things like this. For example: http://dot-bit.org/forum/viewtopic.php?p=2273 http://dot

There are extensions to "Namecoin", a bitcoin alternate chain, that does things like this. For example: http://dot-bit.org/forum/viewtopic.php?p=2273 http://dot-bit.org/forum/viewtopic.php?p=2273