Photoshop how-to site Photoshopsupport.com shows you how to make objects disappear from photos using Photoshop's Vanishing Point tool.

This is actually an excerpt from one of the site's video tutorials. The three-minute clip demonstrates the use of the Vanishing Point tool, which, when combined with the clone tool, enables you to quickly and easily scrub almost anything out of a photo. The results are quite impressive, especially the way the lines in the floorboards stay completely intact. Worthwhile viewing for anyone learning Photoshop (specifically, Photoshop CS2) (less info)