I have been using the 3GUPLOAD website for over a year now to load pictures onto my Sprint PCS phone. I don't have a camera phone, and wanted to add my family pictures to the phonebook. It dawned on me today that the Mac OS X desktop pictures are just jpegs and that they will work on most phones. Just upload a desktop picture to the website. They can be found in the top-level Library -> Desktop Pictures folder. I bet that you could use the Send file feature on a Bluetooth phone as well.
If you need to resize your picture to fit the screen size, use iPhoto (3GUPLOAD does this automatically):
- Launch iPhoto
- Select file -> import, and choose the desktop photo you'd like to use
- Choose the imported photo, and select File -> Export
- Set the format to JPEG.
- Set the size image to match your phone's picture dimensions, and click Export
- Upload it to the website

