Simon Willison recently created an interesting mashup Wikinear, combining Fire Eagle (Yahoo’s new location tracking service) and Wikipedia: It’s a simple site that does just one thing: show you a list of the five Wikipedia pages that are geographically closest to your current location. It’s designed (or not-designed) to be used mainly from mobile phones. The idea for the site came from living in Oxford for a year. The city is full of beautiful old historic buildings (many of them colleges), but very few of them are labelled or signposted. With wikinear.com and a GPS hooked up to Fire Eagle,…