Depositing checks IS supported, at least for customers who have a "Electric Orange" checking account with ING Direct. We don't go out of our way to encourage people to do it because processing checks is expensive for the bank. But you can find instructions on our FAQ page: http://home.ingdirect.com/faqs/faqs.asp?s=Deposits

Depositing a check by snapping a photo with a phone? That's pretty fancy! But perhaps it's something we should take a look at.