Hi, I am thinking to build a web portal using CMS, i.e. user under the portal can build/maintain its own website (using the functions/utilities that we build using the CMS or the functions/utilities directly provided by the CMS) which can have its own users. In choosing the most suitable CMS, I think I have the following requirements: 1. The CMS needs to support 3-layer user relationship. The first is the super admin on the portal level; the 2nd layer is the admin of each website under the portal; and the 3rd layer is the user of each user website. (I know DotNetNuke can handle it.) 2. It must have very good scalability, meaning it needs to be fast/stable/manageable under large traffic. (I heard DotNetNuke is quite slow) 3. It must have a large/active user community/base, with many modules/plug-ins/skins available.. 4. Easy to build/deploy a website, but it should still be flexible enough so that it has enough entry points where developers can control/customize using their own codes. Many thanks. ---------------------