Hello,
I would like to know your outlook for Sensor Logger?
I like the basic idea of it, but I need something more generic. I need to record different data from financial data, metrics (like humidity you have), counters (like download stats).
Your datamodel is tied very much to measuring a metric but a generic setup in a star schema would be interesting (fact table = value; dimension for type like sensor or account; dimension attributes like groups or units)

any plan to go that way - or you want to purely rely on the sensor-api-idea?

Regards,
Rello