This API has been recently updated and posted here:

http://www.asp.net/memberroles/memberroles.htm

You’ll notice that the license has been updated to be slightly less restrictive from the original post. Now you can continue using the 1.1 API on production for 3 months after the release of ASP.NET 2.0, which we expect to be later this year. This is still somewhate limiting, because it presumes you have a go-live plan so soon after the release that you may as well be going live today with Beta 2. I’m not sure if the license will change again, so I encourage you to read the license in the download, when you download it…to confirm my statements are still accurate. For what it is worth, my sample code will demonstrate how to put it to use with 1.1.