Hello again

I would like to be able to submit photos to istockphoto so I need 3 good photos for my application. Im not an experienced photographer but I enjoy taking photos. Ive now finally got a camera and lens Im happy with and have started taking some pictures. Please give me some honest and constructive critique and if you have got any advice on how to improove (lighting, composition etc) that would be much apreciated. The first set of pictures are of my baby boy. They accidently got a bit overexposed but I rather like them a bit brighter (what do you think?) There is a thin thread on his cheek and the drool that has to be photoshoped away. The files (except for the first one where Ive taken away the reflexes in his eyes) are JPEG straight from the camera. I also have the RAW files.

http://www.qualitycrafts.net/Photos/