According to the presentations I have seen, we have to pick one or the other. We have about about 20 frequent users who will spend most of their time at their desks, where database messaging seems to be the better way. We have 50+ infrequent users who would spend a lot less time interacting with the PDM system, but are important to the process (senior managers, approvers, etc). They spend a significant amount of time away from their desks, but are all within reach via Blackberry. It seems like SMTP is the way to go for those folks.
This seems like it would be a common problem, so how is everyone else dealing with this?