You have no idea how many flame wars I had with all levels of IT and security folks.
That said, I agree with OP that it should be done, if it's possible. Maybe if you wait until after you lay off 10k employees, you'll have less devices to migrate ;-)
For all this talk, everyone forgets that Yahoo is (still) profitable! Unlike Nokia or Blackberry, they have a fighting chance, financially.
But, if her job was to build next-generation web-hosted services, her notion of what was possible, normal, and bleeding-edge in the mobile web space would be hopelessly out of sync with the hundreds of millions of Android and iOS users out there.
RIM does seem to have a marketing problem as it seems most Blackberry users have only ever used the old built in house Java based browser. This is due to the fact that WebKit has only been on the newer devices and you can still get older devices so users that used to have a Blackberry, but have had an iphone for X years probably only experienced the Java browser. If someone gets a modern Blackberry from their IT department the WebKit browser that it comes with is good and can hold its own.
I'd say anyone in that position really ought to be trying stuff out on multiple mobiles to get a good feel for it, while using the phone of their choice (even if it's a Nokia 3310).