I do agree with CosmicBeing's post above, Chosenpath. you can divine with anything! You can figure out a way to use it for divination.
I never thought to use my hourglass specifically for divination. I've only used it to help me keep track of the time when reading for a customer in the store. I had one that was 30 minutes.
I would be interested if you find a site that explains how to use it for a specific divination. The only thing I can think of is to turn it over and while watching the sand fall through, keep track of anything that comes to mind.