I'm new to this and would like to see if someone could point me the correct direction.

I would like to create a marketing landing page based on a subscribed user name. 

For instance I have a subscribed user named: Joe Smith

I would like for anyone accessing the site: "www.mysite.com" with Joe name ie: mysite.com/joe or joe.mysite.com to have the main marketing landing pages customized to Joe Smith.  With all his contact information.  So once someone became a subscriber they would have this capability for a customized landing site.

I would also like to create a "leads" database so that anytime someone came to the site whether they regested or not, Joe woold know about it and what pages they saw. 

Do you want this to be automated or are you going to be creating unique landing pages for each user?

You could potentially do this with child portals in DotNetNuke. - If Joe has his own child portal he could login to his portal and view the stats for the portal.

If the content is going to be the same for each landing page you could create a portal template which is automatically applied when you create the portal.

As a starting point have a look at:
Issue 17 - DotNetNuke Portals

This should give you a starting point and an idea of what you can achieve with portals.

Thanks for getting me going the the right direction. One question on having to change the Host Header settings. Would it still work if they just set up forwarding in the DNS panel to forward to www.mysite.com/child1 instead of having to modify IIS? Can the Portal Alias function pick up www.mysite.com/child1 and redirect it to the correct child portal?

Thanks again for the help.

hello

If you are using child portals you do not need to modify any settings in your hosting providers control panel.  It is all taken care of with DotNetNuke. You only need to adjust settings with your hosting provider if you are using parent portals. - if you are looking to automate the process as much as possible child portals will be quickest to set up.

Thanks,