I recently wrote a bit about why I think Dwolla doesn't understand their problem and what the core of their business really is. I have a strong doubt that a central entity is the best way to approach the problem of money transfers and after talking to Dwolla representatives don't feel comfortable ever giving them access to my bank accounts.
Popmoney is already partnered with many banks and I believe they are in a better position than Dwolla at this time to provide such services if they put an API on top of their system.
Popmoney is pathetic; three days to move money between accounts at the same bank (PNC Bank). I might as well go into a branch, withdrawal cash, and deposit it into the destination account, in which case the transfer is instant.
Popmoney is already partnered with many banks and I believe they are in a better position than Dwolla at this time to provide such services if they put an API on top of their system.
http://www.shtylman.com/archives/319