Tell Your Stories On Social Networks, Wikis, And Other Social Software

I’m currently working on a story about social software for Bob Thompson’s CRMGuru online community (http://www.crmguru.com , over 200,000 members). I’m looking for good stories/responses to the following questions from folks who are willing to share them. If you have a story to tell* about your company, feel free to drop me an email.

1: Which companies are using social software (esp. social networking, wikis, and the like) in order to better connect with customers? There are quite a few stories regarding blogs and individuals using social networks successfully…how about organizations?
2: Is there an example (or two) of an instance where you have seen a company get closer to its customers as a result of these capabilities?

3: What have been the challenges / downsides for organizations that are attempting it?
4: Are there any things that organizations should consider if they are considering including social software (esp. social networking) as a part of their connection to customers?

So…any good stories out there?

* – PLEASE NOTE: Comments/emails may be quoted in the story. Please feel free to include your name, title, and company.