Previously available as a website optimized for mobile devices, Worldcat Local is now also available as an iPhone app. I played with it a bit last night and really liked the mapping features. It knew where I was and where the 10 closest libraries to me were. Well, those libraries that participate in Worldcat; it seems Calgary Public Library does not. Easy enough to find copies of the books I was looking for, but though it initially correctly identified my location, from the books results screen it kept insisting I was in Seattle, making the "find a local copy" option useless. How's that feature work for the rest of you?