- No IPv6 -- sucks, but I can live with that
- No IPv4 -- WTF? NAT on a server?!
- A credit card is required. I can't pay them. Asked via support, they confirm credit card is the only way.
- I still haven't found where the instances are physically located. (Edit: it's in the "General FAQ", not in the "Server FAQ".)
I really, really like the idea, but they have a long way to go.