On Gingerbread users can report apps for their battery usage, by going to Settings -> About phone -> Battery use, and then tap on a specific app.
My question is, as a developer where can I see these reports?
They seem very useful because they contain information on what type of wake locks you might be leaking.
Sorry I don’t think this information is currently available. It is being collected, but at this point there is no UI for developers to retrieve it. (This is also true for reports coming about running services.)