You'd think the least they could do would be to just break the glass to get in. That really sucks. Did you make sure to get a full police report and everything? Rest assured your police department won't actually go out and investigate anything, but you'll need one for insurance. If you don't think it's covered by your insurance, be sure to call your agent and have them check. I've got a good enough insurance agent that they work to find a way to have things covered for me.
This does remind me I've been meaning to make a list of all my serial numbers for everything. At least here in Berkeley, all the pawn shops are required to check anything with a serial number in the database of stolen goods. Definitly worth spending half an hour getting together before your car/house/appartment gets broken into.
Matthew