Pam, iPad has it's own limitations there, too. There's no hard drive space where you can store photos or documents. So you can't post from the ipad if you can't store anything there. You could post pics from a photo hosting site (like photobucket, webshots, picasa, etc), but Dave's sites don't support their use.
You can post to other websites using the photo hosting sites, though. I use photobucket. But the ipad app for it is clumsy at best, at least for me.
Karen