SiteSkins: Using Fotosizer to Scale Down Images for Rapid Uploading
Uploading images to SiteSkins can take a long time if images are not pre-scaled first. If you do take a minute to learn about pre-scaling, you'll be very glad you did. This free online tool, Fotosizer works excellent for scaling down images. It's very fast and does the trick! Fotosizer is NOT affiliated with SiteSkins, we just recommend using it if you are on Windows and do not already have Photoshop.
For more on SiteSkins: http://www.siteskins.net/
For more on Fotosizer: http://www.fotosizer.com/