The notification system works not just for sold-out hotels but also for sold-out room categories. Say you want a room with double beds but those are sold-out. Sign up with Hotel Room Alerts to get notified when a double-bed opens up again. Hotel Room Alerts founder, Dylan Loch, came up with the idea after trying to nab a certain room type at a hotel for a weekend getaway. He was constantly refreshing the hotel's online calendar before finally getting the room he wanted. But it took him a month. The site officially launched last July but at the time, it was charging 99 cents per alert. However, Loch did away with the charge in late November and has made the alert system totally free. Since then, Loch said 500 people have signed up for room alerts. And we imagine that number is only going to go up now. Get the full story at HotelChatter