Well I totally agree that IQJam should work completely stand alone.
But I see the potential that a lot of questions no current solution but the question itself is actually an Idea. You've had one here already:
"Does IQJam have mobile clients for iPhone or Blackberry? "
Which could easily be an Idea: "Create Mobile (iPhone, BB) clients for IQJam". How many questions do we see about Notes where its "Well, it can't really do that right now, but gosh, that's a good idea!"
I guess I'm thinking that Ideas can start life as a question.
Here's what I think you might want to consider doing.
1.) If a customer already owns IdeaJam, there should be a way for someone to easily create an Idea from the Question. Maybe all the discussion goes along. Maybe it's an option. I don't know.
2.) If the customer does NOT own IdeaJam, you may want to add a LIMITED version of IdeaJam into IQJam. Meaning, that maybe certain questions could be tagged as an Idea in the solution. Then you add a means to view all the ideas that's been generated. Maybe you just don't allow voting on the "new Idea". But then the customer can see any ideas that are being generated and might get more interested in IdeaJam.
Just my uneducated thoughts on this.