Smart Playlists

What would be awesome is if AzuraCast had some kind of Smart Playlists functionality, where you could have Centova populate a specific playlist based on specific criteria such as

- Song Date (Release date) [ie songs released between, on or after a specific date]
- Based on any custom fields

This doesnt have to run constantly but either manually triggered, or on a schedule, similar to the Automated assignment feature (infact, this could be an enhancement of Automated Assignment)