Rating: Summary: Better than the average kit lens Review: Most kit lenses are useable as paper weights and not much else. The 18-55mm is a nice exception to that trend. I recently bought a 20D to go along with my film body and got this lens because the 1.6x crop on the 20D robbed me of my nice wideangle lenses (though I've got much better telephoto now). For the price, it does a nice job with the sharpness. The color isn't the best, but with digital we can always tweak that later on.
If you can afford the 17-40mm f/4L or 17-85mm EF-S, certainly buy those instead. If your budget is tighter, this is the best way to get a wideangle lens on a 20D or Digital Rebel. The Bob Atkins website has a great technical review of this lens as well.
Rating: Summary: So So!! Review: This lens comes in a kit, so you shouldn't expect much out of it. It feels light weight, and very cheap. If your looking for sharpness and beautiful image quality, I would go with an "L" series lens.