User logins and museum websites

This is a quick survey to see how many museums offer some sort of registration/login on their sites, what for, and where off-site they engage with "identified" users i.e. those who must or can log in to perform an operation. I'll use the info for a blog post initially, but if you want me to be discreet for whatever reason then lemme know, that's fine.
The survey relates to a set of blog posts I've written on the subject, check them out here: http://doofercall.blogspot.com/2010/02/museums-and-online-logins-preamble.html
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