The Yukon setup team is looking for feedback related to your setup and installation experience. They've setup a survey that asks for a few demographics as well as your experience and any issues with the setup of the Betas or CTPs.
They are looking for error messages as well as your impressions, so if possible, do an install and take the survey soon afterwards. Save your errors, jot some notes, etc., while installing SQL Server 2005.
If you want to help improve the setup process and spare some others the pain of problems, please take a few minutes to complete the survey. This data is very important to the survey team to capture and help improve the user experience.
You can access the survey at: https://live.datstat.com/WSS-Collector/Survey.ashx?Name=SQL_Server_Setup_v4
