I use http://www.imagestation.com/
You have to sign up (free, just some personal info they can sell). Follow the sometimes confusing directions for uploading your pics.
Do not use the link that Imagestation gives you for the picture. Instead, right click on the picture, select "properties", and copy and paste the URL into your EpicSki post. Or use the "image" feature at the bottom of the Epicski post reply page by pasting the URL. Note that most image hosting sites really don't want you to use the actual URL of the image, but that's the only way that everyone can see the pictures.