I think if you're going to be successful, you'll have to find a different set of early adopters. Bitcoin is as much ideological as anything, and while some people don't want to see another alt currency because of their level of investment, others just generally don't believe there's anything wrong with the system today.
Anyways, i'd love to actually develop the idea... but I didn't want to spend time on "just another altcoin" unless I had faith it might get some adoption.