Nothing more frustrating than coming to an office and find out there is no one to greet you, or direct you to your host. Often small offices and start-ups do not have budget for paying a person to perform this task. The team at mygreetly.com saw on this issue a business opportunity. They offer you an Ipad App capable of notifying, directing, and logging your visitors. I like this idea, because it is simple, scales, and solves a clear problem. Also very compelling is their pricing strategy. There is an interview with the CEO at the blog AlleyWatch where he explains more this cool idea.