@jslack: Awesome! I sent you a DM too with the details. I'm using NoSQL storage for my app so it makes it easy to cache results from GiantBomb; that is exactly how I store cached searches (by hashing the request).
Great to hear there'll be enhancements soon, one of the big asks is the ability to filter by ranges or gt/lt (i.e. /games/filter=date_last_modified:(gt=xxx<=xxx) or something).