Although it would be fairly difficult to work .bz into a fun domain hack, you do have options. It's quite often used to represent business. Your company could get in on that action with your own .bz domain. And if you or your business are based in Bolzano, Italy, which is officially abbreviated with BZ, then .bz makes a lot of sense. Finally, want to get the word out about your business or product? Why not start some buzz with .bz? Sure, it's not anything official, but it's memorable.