-OR- you can actually read this thread before posting to it.
Although Skitch is still in a limited beta by invitation only it is an EXCELLENT solution for drawing/painting/photo-resizing/sending/receiving photos and pictures (which is what the OP was looking for and what this thread is about).
Put in your e-mail address at
http://plasq.com/skitch and give it a try. You might wait a week or two but I think you'll be glad you did especially if you have an Intel Mac.
When it's officially released this program is going to be a huge hit.