walkit.com

The other day I was discussing how great Walkit.com was and I remembered how few people knew about it. This site is for you City folk (currently in London, Birmingham, Edinburgh, Newcastle, Leeds and Derby). Put in your start point and end point and it will give you the shortest way to walk between these points. For fun (in my opinion) it gives you the number of calories you will burn given your walking speed - I naturally walk a bit faster than Walkit.com's definition of medium.