What other technologies are working on this? I actually just heard about cryptonote in another thread. And thats not the same Bytecoin that came out a while ago right? I found a couple of websites for Bytecoin and was confused...
Monero works (as do the rest of the CN coins including the reference code, as you pointed out), ZeroCash will work as well (although it will have a trusted accumulator problem that remains unsolved at this juncture). No others have this - if you can view the balance on an address it is not untraceable.