Did you see the way people are trying to improve MS Outlook? The website 'Outlook's broken - let's fix it' is a protest site against the proposals for a future version of Outlook. But it's also a way to share and collect ideas about what Outlook should look like in the future.
This is a great example of collecting ideas for future product development (using mass collaboration for innovation)! I also like the way they visualize all the contributions. It shows the power of Twitter. It also shows contributors they're not alone: lots of people agree with you and we can shape the future together or at least try to influence it. Shouldn't every product have such a site, with a tweet fetcher?
Oh, and my contribution can be found here.
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Collecting Ideas Mass-Collaboration Style http://twurl.nl/dlqkq6