Personally, I wouldn't put anything on the web that is more than 800x600 pixel for the following reason: upload and download time. Even with a broadband connection it will be as slow as a turtle. For folks who still have dial-up... forget it.
www.photobucket.com allowed 1024 x 768 Pixels. You can sign for free, allowing 1GB.
Nikon D90, D80
Nikkor 16-85mm AF-S DX F/3.5-5.6G ED VR, Tamron SP AF 28-75mm F/2.8 XR Di LD Aspherical (IF) macro, Nikkor 50mm F/1.4D, Nikkor 50mm F/1.8D, Nikkor AF-S VR 70-300mm F/4.5-5.6G IF-ED, Sigma 105mm F/2.8 EX DG Macro ||| 2x SB800 | SB600 ||| Manfrotto 190XB