I've watched Highlander WAY too many times to actually want immortality. Couldn't stand to watch everyone I know and love die around me while I just keep living through the centuries. Now, If I were evil, and wanted to do something... say... world domination.... it might be something to consider!
Now, would this "add one year" provide for some regenerative abilities as well?
Also, this all sounds kinda "Vampire" like to me....
Interesting topic though...