I have uploaded some sample pictures to the Canon EF 70-300mm f/4-5.6L IS USM Lens Review.
The weather and landscape have not been very outdoor-photo-friendly here recently, but I intend to use this lens a lot more this year - including on a couple of photo trips I have planned. So, I should have more (and more varied) sample pictures to share later.
Be sure to check out the comments and tips for each picture.