InnoDB is disabled, and instead TokuDB is the default engine, which is faster than InnoDB and has better recovery times.
To add yourself to the list send an e-mail to office@spheredb.com. Current beta server is located in Chicago.
If there are people eager to start using this quickly, perhaps in order to get rid of their AWS RDS setup in favor of this sort of setup, dedicated instances can be set up, at cheaper prices than what AWS charges for their higher-end instances and better I/O with no virtualization overhead. Whole LAMP setups can be arranged as well if you don't like latency, with very little management required on your end.
Feel free to ask questions or just post your opinions.