To help you get the most out of a trip to Madrid, PadInTheCity are offering iPad rental for 39€ a day. The iPad 2 comes loaded with Madrid and travel related apps, and they'll even deliver it to your hotel. However to rent one, you need to present ID and give a 500€ credit card guarantee as a deposit, which won't be charged unless you fail to return the device. We think it's a great idea and wonder whether other cities will follow suit.
To find out more, here's a link to PadInTheCity.