For years, I've been going on and on with family and friends about the need for a Web site or software to track all the stuff lent to people but never returned for whatever reason. In theory, this system would have worked by creating a user-friendly database to store information about who borrowed what. When you wanted something returned, the system could manually or automatically send out an e-mail or text-message with a friendly reminder: "Hey Bob, you borrowed my lawnmower three weeks ago. Any chance of getting it back soon?". Brilliant, eh? Well, it was so brilliant, BillMonk has run with my idea. In fact, it's so close to my "vision", you'd swear they had been eavesdropping on my conversations. BillMonk also lets you track personal loans and collect payments. I'm particularly intrigued by the "Shared Bill" service in which you send an e-mail to people about splitting the cost of a bill. This would be a very interesting way to deal with people who go out for dinner in a group and instead of agreeing to split the bill equally, they ask for a menu and go over each and every item to determine their exact payment - which is always less than just splitting the bill. In most cases, this kind of behaviour is a friendship-killer.