Regarding Mixing Service. Do we need such on-chain service that mixes coins with anonymity-reliability trade-off? 30% anonymity means 70% reliability to get all the coins back. Yes, it means that with 100% anonymity u could get 0% - 200% coins back.
Wow, that's even better deal than my exchange
That approach is trustless, but the guy wants 1'000'000 NXT for that.
That would be a huge step for Nxt and cryptocurrency in general though.
The 1 million Nxt would go to someone who's smart and has a stake in something he supports; win-win-win, Nxt, it's community and him.