Heaven help the Blackberry is all I have to say. ;(

Apart from the obvious .Net haters (like Scott) this will obviously be a boon to most medium-to-large corporations with a need to leverage the Blackberry population, and who have a large incumbent .Net team. As Blackberry supports push, then there's a lot of utility there for sending alerts/job schedules, etc. Not sure why this would be considered a detriment.