I'd also be interested in any information about the repository tables.
There's an option to execute custom alerts against the repository (and it also can be used in the Database Query Tool) which might be useful, but without knowing the repository configuration, it's a bit hit and miss.
A simple one I'd like to know right now - where are the start times/next run times for alerts stored? If I can tweak some daily alerts to run at specific times, I'll be pleased