Catherine Shinners shares some hallway conversations from Office 2.0. One thing stood out for me as a simple practice to get people to share their ideas from Toby Moore. With the workplace, and school for that matter, we are taught to hold on to our ideas. Generation M, however, gets their homework done on MySpace, what some consider cheating, but when they enter the corporate world -- it is collaboration.
The other practice is the "3,4,5" notion. Most people focus on their top two ideas as try to refine them as their best ideas. At the IOCT, people are encouraged to disseminate their third, fourth and fifth ideas, things that they, themselves, might deem "lower tier," or "half formed," but by putting it out to the larger IOCT community, someone might be able to help advance the idea, to see where the idea might flourish in a broader context.
In this way, as Toby says, it's open source ideas, and while the technical open source community's mantra is with enough eyeballs, all bugs are shallow, In the realm of innovation and ideas, I pointed out that it's more like, with enough eyeballs, more ideas have legs, and are possibly richer in their potential.
Another way to approach this is encourage people to share ideas for project that are context, not core, to them at least. Of course, you have to make those projects transparent and grant permission to participate.