One for the more serious amateurs.
About £220 cheaper than the nearest price and cheapest it's ever been according to http://www.camerapricebuster.co.uk/
If I could afford it and didn't have a Nikon I'd be very tempted :D
The EF 70-200mm f/4L IS USM is a lightweight, compact L Series telephoto zoom lens with Image Stabilizer. The optical Image Stabilization in the new EF 70-200mm f/4L IS USM lens provides up to an incredible four stops of shake correction-a first for Canon IS lenses. The use of fluorite UD lens elements provides excellent optical performance in terms of resolution and contrast. These features, together with its water-and dust-proof construction, provide both the performance and portability to meet user demands.