Speaking from experience: Working for Public Safety for Vail Resorts and now working at a shop.
Unless you have a serial number and just happen to run into the guy that stole your skis, and are able to check the number, you're pretty much out of luck. You can file a police report with the SN, but they aren't going to pass the information on to any shops around, they have a lot better things to do than search for a pair of skis. I know it's hard to swallow that, but if you think about it, if a pair of skis gets stolen every day, from each resort in Summit County (which is logical), you'd be looking at [at least] four pairs a day. That is a LOT of work for any Police or Sheriff's office to work on considering that it's already close to a lost cause getting gear back.
I'm really bummed to hear about that, whenever I hear that gear has been stolen, I always wish that they culprit breaks his/her legs when they are using them. It's only fair. Besides a lock though (because locking your skis up is smart, but really annoying), I've found that just having stickers on gear is a pretty legit deterrent against theft. People who are taking gear are looking for new, expensive, popular, unmarked equipment that they can get away with easily. If they see it covered in stickers or a unique feature, it's usually left alone.
Look luck to you my man. +vibes, I hope I'm wrong.