That's a long way from solid evidence of anti-competitive behavior. These guys have a right to be upset, since it's been two months since they first submitted, but they should remember Hanlon's razor when trying to explain things.
Rather than trying to cover things up, chances are that the customer service rep honestly has no idea about the IM+ app submission. It's probably not his department.
Likewise, rather than RIM deliberately trying to block IM+, the two month delay is probably due to lack of staff, bad prioritization of tasks, or things otherwise falling through the cracks,
Point is, these guys have invested man months in an app that would add value to the playbook, and all they are getting are dazed canned responses.
In a similar position it seems more than enough to decide to drop RIM development and move on with the other platforms.
It sounds like that approval process is pretty messed up at the moment, though. Two months without word seems to be slower than Apple at its worst, and the fact that this app's developers even tried to reach out to regular customer support instead of developer relations implies some serious disorganization.
Perhaps some logic like this: we can't lose "our" BBM users but blocking IM apps would drive users and developers away. Let's quietly block IM apps at the approval stage!
Also, "anti-competitive" is the wrong description - unless you count killing your own company. :D
Maybe some will and they'll get away with it, just as right now Zynga are doing pretty well even though they're almost completely dependent on Facebook, but the average app developer doesn't have the highly valuable and almost symbiotic relationship that evolved in that case. Meanwhile, much of what apps do could also be done almost as well using web-based software, which can run quite happily on any modern mobile, can be developed at a fraction of the cost of targeting each platform with a native app, and doesn't carry any risk of lock-in or summary execution by random platform developer/app store employee.
