Are there any more statistics that you plan on exposing via the API?
What info do you want to fetch ? Suggestions are welcome.
Slush's pool has "estimated reward" - it calculates your proportional reward during a round by dividing your shares by the total shares.
I'm not sure it would work with the delay here.
Your estimated reward in DeepBit depends only on your speed and the combined pool hashrate, both of those stats are available.
It won't jump up & down because i'm not using score-based system, that's why i'm not showing "estimated reward". I can add it, but it will be the same for all rounds if your speed is constant.