Hey, I did start something similar here : https://bitcointalk.org/index.php?topic=4480507

Because I am lazy, I posted in "serious discussion" section so I wouldn't have to many (poor) replies. For the same reason, I also didn't read the 6 pages your thread's got already.

But, you might find some ideas that aren't in your list yet.

Good luck.

Edit: seems like I'm too late... I just saw that Theymos answered already !