Anonymous access in Sharepoint

http://sharepointlogics.com/2009/05/how-to-enable-anonymous-access-in.html

http://www.sadev.co.za/content/sharepoint-survey-permissions-2-allow-anonymous-users-addedit-surveys

http://www.tech-archive.net/pdf/Archive/SharePoint/microsoft.public.sharepoint.windowsservices/2007-04/msg00590.pdf

http://blogs.msdn.com/gyorgyh/archive/2009/03/28/trouble-saving-add-or-edit-list-items-permissions-for-anonymous-users.aspx

http://ddkonline.blogspot.com/2009/03/how-to-allow-anonymous-access-to-one.html

My problem (grayed out items in list anonymous users permissions) was solved by 

• List settings > Advanced permissions > Allow read permissions to "All Items" instead of Only "their own" and then recheck the list permissions for anonymous users.