Actually, it's now shown on your downloads page for purchased products. Go to My Account, and then into Product Library. Enter 8.5 into the filter field and search. The Carrara 8.5 beta should now be show. Left click on it to get the information panel. The Serial Number is listed in that information panel.
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It is always in the first post of the current Thread about the beta, towards the bottom of the post
http://www.daz3d.com/forums/discussion/20690/
Actually, it's now shown on your downloads page for purchased products. Go to My Account, and then into Product Library. Enter 8.5 into the filter field and search. The Carrara 8.5 beta should now be show. Left click on it to get the information panel. The Serial Number is listed in that information panel.
Boojum the brown bunny