The quick answer I think is not directly. however if your 'phone is connected to either your pc or a laptop and either of them see it as a hard drive or you've backed your photos up to either of them, then yes you can.
Update
I tried it on my blackberry (not connected to pc or laptop) and the phone closed my Wiki page as being too large to load, however if your phone does let you log into this site and loads the page(s) Ok, then go to the page you want to upload the photo to and select the upload link and then proceed as if your phone was a pc or laptop for the upload, e.g. follow the instructions for uploading photos.
I'm not sure how many 'phones this might work for