Some time ago I stumbled across Awardmapper, an absurdly simple and useful website:
Awardmapper's creator is active on Flyertalk and has said that he originally created the site for his own use after getting tired of opening multiple tabs to search for award rooms across multiple programs. He later decided to make the site "live" with the hope that it would be useful to the miles & points community. Well, it turns out he's created a marvelously useful trip planning tool.
Here's a sample screenshot of a search I just performed:
The caveat is that Awardmapper only displays hotels and award rates. It won't tell you whether the hotel has availability on any given night. So, the site isn't a silver bullet for hotel award bookings, but it certainly takes a lot of work out of the process. Thank you Awardmapper!