cryptosphere lol.
guess you mean alternative cryptocurrencies.
no one in cryptography has actually researched cryptonight algorithm.
it might be ok or not, but nobody knows, because nobody solid or respected in the 'cryptoshere' has bothered to look into it.
there's been lots of research into sha256 and so far so good.
as for fungibility and anonymity, tell me how many bitcoins do I own? there's no evidence for this.
and would Overstock accept a bitcoin if I sent it to them any less than the next guy's coin?
they aren't blacklisted yet, people can fudge their ip addresses, fluffypony is nice. but dim.