Yeah Raw is the way to go... Not quite sure about the noise you talk of with regard to Jpeg as Raw images dont have any compression to start with and as you have to resize the jpeg anyway to post you are then adding further compression which will add  noise, and each time you save... In reality as you are posting on the web 72 dpi is all that is required you wont notice the improvement from Raw until you print at greater than A4

I fully agree with the comments from the other guys..

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt