What camera do you use?

I just tried using our Canon PowerShot S3 IS to take pictures of my nail polish storage, and the pictures don't seem better than the pictures I take with my iPhone4.  The camera goes to 6 MegaPixels.  The iPhone4 is 5 MegaPixels, I think.  I will go take the same pictures with my iPhone4 and compare, but I am interested in hearing about the cameras you use and in any recommendations.

Thank you!