For the past four years VersionOne has run a survey for Agile adoption and published the results to the community. While it tends to lean towards people already adopting Agile practices, it is nice to see some numbers on other people's adoptions. I always take surveys like this with a grain of salt since questions that gauge the success of different Agile practices are very subjective. A developer answering the survey may have a different view of Agile's "success" in the organization than management. But all in all it's a decent survey and I encourage you to take it to help make the results that much more meaningful. Go here to participate in the survey.