I have set up a multi-site network without any problems. Everything seemed to work fine. One key requirement for my network(s) is for users to be able to use their own domain name. I have read a number of articles about this issue but I am unclear as to the best approach. So I am hoping that if I define my requirements you can give me some direction. I will be using a dedicated server for this but haven't purchased that yet. I am creating niche networks using Multisite and in some cases MarketPress and in some cases MarketPress and BuddyPress. I want just one install of WordPress and all niche networks use that install. So, each niche network would have a primary (parent) site that controls all the themes/plugins, etc and child sites for that niche. Each child site can have its own domain name. The end result is that I may have 20 primary domains, each with child sites, each with its own primary parent site, all running under one install of WordPress. Am I correct in understanding that I could do this with multisite and domain mapping & multi domain plugins or a plugin such as Networks for WordPress. OR, do I need to set this up so each niche network has its own install of WordPress and the domain mapping plugin. Your advice is greatly appreciated. By the way, so far I am very impressed and very happy with WPMU Dev. Thanks!