isn't this rather risky? eg: couldn't Apple simply decide to do this and they could? is this a 3rd party app, eg: exit mail, enter remail, search, re-enter mail?
Apple hasn't had the best track record of acquisition over internal innovation thought. There was coverflow and a few others sure, but lots weren't acquired...
This would be one problem that they could throw money at and it might have a positive effect. :) If they operate it as a mostly separate company then they could have a branch that could innovate rapidly and also not disrupt any existing teams/culture inside the organization.
