Pics from Computer to Phone

My friends can take pictures with their phones and send them to me as a picture message, and I can view them on my phone, even though I don't have a camera phone.  I was wondering if there was a way to send a picture I have on my computer to my phone.

- USB phone cable
- e-mail your phone
- webhost the image, then download on phone via web
- mobile phone provider upload service (sucks)
- give the images to a friend who knows what he's doing and have him send it to you