Custa, in response to your question:
"Also wondering from those that have been using for a while how frequent new versions are and how much they feel community concerns are addressed?"
I started using Axure back in September of 2007. I noticed that one of the biggest painpoints in Axure came when trying to simulate the expansion and contraction features that are common on most webpages. I had to create layers upon layers of dynamic panels, which was not only time consuming to create, but also took forever for the page to load. I used this very Forum to suggest (and if I may be so bold to state that I believe I was the first one I've ever seen who made this specific suggestion) that they add functionality to Move dynamic panels in the next release.
http://axure.com/cs/forums/thread/2052.aspx
I mentioned how this would add immense value to anyone using Axure to do any web related projects, and would allow us to do pretty much anything. Much to my surprise and great pleasure, they created exactly this, called it "Move Panel", and it was released not even 5 months later. And let me tell you, it made my life (and hopefully others) SOOOOO much easier, and it was a free upgrade on top of that.
So I can personally vouch for the fact that they DO pay attention to this forum, and address community concerns. If you come up with a good idea that helps everyone, without causing additional issues or making the Interface more confusing for others... I'm confident they will incorporate it. In my opinion, there is no other software out there that is better for creating the prototype/specification combo than Axure, and if they keep taking suggestions from us, there never will be.
Daren