Steem Ninja (@oracle-d) tokenized their account tokens with Steem Engine. It's very easy to swap those to an account. I tried it out and works easy.
https://steemit.com/invite/@oracle-d/introducing-invite-token-mine-steem-accounts-through-delegation
Also:
We expect that this will allow for an 'invite a friend' process to happen instantly on steem. In a couple of weeks we will also open source the steem ninja widgets to allow for any account holder with a number of claimed accounts to tokenise them on Steem Engine, this will allow for whales to easily create liquid markets for their accounts via tokens. Both solutions will bring liquidity, ease of sale and instant onbaording to steem