I was wondering if there is a way to filter questions on waiting time, i.e. searching for the oldest non-answered questions. Is there an open database on Math SE which can be analyzed to get this kind of data?
The Stack Exchange Data Explorer may be of interest for all* your Stack Exchange data exploring needs. Whether it be spelunking in the the comments, an archaeological dig through questions long since forgotten, or searching for strange oddities.
* (Well, not all. You won't be able to discover who has downvoted you... dag nab it!)