My thinking on this was that if they bought RIM they would greatly increase their marketshare in those "boring" but profitable "enterprise products". Lets face it the Blackberry OS sux, even v6 is a poor iOs clone and Windows mobile has reasonable enterprise penetration but not great. So put the next version of the Blackberry on a decently powered hardware and WP7. Offer activesync as an option a silver option and BES as gold option. It could be a synergistic mix for both companies that would let the focus on what they are good at (enterprise over consumer in the mobile space), leverage RIM's excellent marketshare and with MS enterprise OS and Exchange products and actually allow them to effectively fight Apple and Google in a very profitable area.

Agree with you on enterprise tablet, imagine the "Blackpad" running WP7