Loopnote is a product of No Sleep Media, that lets people create alerts about an upcoming event. The way it works is simple: You create a topic like “Governor’s Park Band” and let people subscribe to it. When you’re ready to promote an event just post a note to your topic like “Governor’s Park Band playing 2nite at 9pm, Larimer Lounge”. All subscribers will receive an alert with your note. People can subscribe via email, IM, text or RSS.