We used to push out release notes via PDF from customer support. The feedback there was notes are good, but a comprehensive list is better. A change log is better.
Yesterday, I put finishing touches on our WeatherSentry API Services Changelog up to where we are today. And as you might guess, we're in the midst of working on our next update, update #5. This next update will better support multi-station or bulk station requests.
We've also made some changes to our database indices where we made a significant dent in query performance time - this change, while not an official release, is already in production.