I'm not able to post a photo directly from my phone to the website. The 'add photo' link doesn't work for me when I'm looking at the forums using the Safari browser on my iPhone.
What I've done instead is:
1) plug my iPhone into my computer and copy the photo from the phone to the computer.
until I switched to:
2) using the Dropbox app for my phone and computer. I add my photo to the Dropbox on my phone, and it shows up in the Dropbox on my computer without having to mess around with cables.
But I've had no trouble leaving comments on the forums or the blog using the phone's browser.