Yeah, as I suspected, this is how ING Direct is able to offer "free EMTs" since what they're doing is essentially placing the funds you send into their internal bank suspense account then asking the recipient to enter their institution, transit and account number to deposit the funds into their account via EFT (which explains the 1-2 business day delay).
I kind of wondered how they'd be able to offer free Interac EMTs when Axcsys Corporation collects mandatory $1.50 charges from member financial institutions on behalf of Interac Association, regardless if the FI collects the $1.50 sending fee or not. For FIs that offer free Interac EMTs, they're likely offsetting those costs by charging monthly fees which ING Direct isn't doing.
Short answer: Don't expect free Interac EMTs from a free chequing account any time soon. Potentially, I could see FICANEX, operator of The Exchange Network, put together some sort of free EMT service at the request of its member FIs but given many credit unions have joined up with Interac's EMT service, I'm betting that's a long way off too.
Cheers,
Doug