Nigel Pendse has renamed his OLAP Survey to the BI Survey. Major players in BI, including Microsoft rely on the data in this survey to analyze consumer needs. From the invitation:
We would very much welcome your participation in The BI Survey. This is the largest independent survey of business intelligence/OLAP users worldwide. The Survey will obtain input from a large number of users to better understand their buying decisions, the implementation cycle and the business success achieved. Both business and technical respondents are welcome.
See Nigel in action,
talking about the newest release of his survey.