>>.Net has access to the memberbership and personalization information with controls out of the box, you'd have to write the same stuff in VFP. Does your product allow multiple sites from the same code base and tables? Can you apply skins, as well as different skins to every page? I think not, why try to reinvent the wheel?
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>What is a skin? Is it important to have a different "skin" for each page?


See Rod's response for the definition of a skin with examples. I have 4 websites I'm bringing up under dotNetNuke. All use the same code base and all use the same sql Database. I can change the look and feel of all the sites independently from one another even thought they use the same code.