Via LufthansaFlyer:
https://www.usingmiles.com/account/signup?abv=2-3&pc=LFLYER
Source:
http://www.fatwallet.com/forums/hot-deals/1211385/
Disclaimer: I have never used this site (let alone heard of it until today) or AwardWallet, but thought it might be useful to others. 🙂