About Pi, guys this is a massive project (it is a full fledged trading application) and the reason for putting it out was to ensure that when we have the final release, we don't miss out on any expectations.
@throwaway, we will call this pre-alpha/alpha release from now, if the question is all about calling it something.
It was also important to have this out, to see how our backend systems work. We have just put an entire new rack of servers which we will be migrating to in the next week.
So yeah, like we have said before, Pi is not something anyone is compelled to use. If you want to test it and help us spot/fix bugs, it will be helpful to have the final release out soon. We will put up another release early next week, and yeah will inform when the data server is completely functional.