<p>Looking for a toolkit/SDK for general Blackberry development or application toolkits. Anything like an MVC framework?</p>

My understanding is that blackberry's OS is Java ME - based, and that there's a decent development kit for them.  I presume you have already
looked over everything here
... you can find a lot of information, including the development kit download link.
Regarding model-view-controller, there's no particular framework to my knowledge, but I don't see why you wouldn't be able to take MVC as an approach in the paradigmatic sense.  Google has resources out there on java developers working with MVC.