Apparently some of the no-chill brewers from australia do this. They put their boiling wort into an air-tight winpak, seal it up, and let it cool. I've read some of them saying that they'll keep the sealed-up cubes a room temp for months, even, before they pitch. I'd start poking around the no-chill threads here or on other forums to find out more.
Seems like an interesting way to have fresh beer around all the time. Spend a weekend brewing up a sh*tload of batches and then pitch them at different times. Also works if you have limited time to brew, but can only regulate ferm temps for one batch at a time.