Hi there, first of all: an amazing plugin! Thank you very much for your big and hard work! :-)
This feature would be nice: A function to garbage the cache at a specific time (for example every evening 6pm). So an alternative to the "Garbage collection interval" on the "page cache"-point.
Or better: To add in articles a function (in editing mode) like "PURGE THIS ARTICLE FROM PAGE ONCE AT 2011/04/01 06.00pm" ...or regular daily at a specific time.