i wasn't directing my post to you pug, i've seen some of your photos and they're great.
most people think that if they upgrade their camera from 4 to 5mp that it will produce better pictures. the difference between 5mp and 8mp is negligable and at normal size is the same to the naked eye. Becasue cameras are stated by salesman and camera company's in MP you need to know that it is a con designed to sell more cameras. This MP figure is acheived by multiplying the horizontal pixel count by the vertical pixel count. Therefore, to get any visual improvement on prints of say 6"x8" prints, you will need to quadruple the MP figure of a camera.
Of course if you are taking photos for a billboard, then you may need a Canon 16MP, but then again, do what the pros do and shoot large format.