Most people think that you have to use the WCM features of MOSS to deliver a public facing web site. It is true that MOSS provides a very rich platform on which to deliver a WCM solution, if all you want is a simple but dynamic publishing site then you can't beat the value of WSS as a CMS. I have had several people asking me for any resources I had for how to deliver a public facing WSS site so I thought I would recycle the answers into a post.
SharePoint Designer is Microsoft's tool to customize the OOTB SharePoint UI. Watch these demos
http://office.microsoft.com/en-us/sharepointdesigner/HA102199841033.aspx?pid=CH102201271033
Update: SPD is now FREE!
Better branding of the WSS site can be achieved with 3rd party solutions/frameworks:
Here are some examples of sites running on WSS...
http://www.wellington-college.school.nz

(created by a New Zealand company http://www.provoke.co.nz)
http://www.nordam.com/default.aspx http://fa.iwpco.ir/default.aspx
I don't track WSS public sites in the MOSS list any more but feel free to list any you know of in the comments of this post and I'll approve them.
This post will probably lead onto "Why don't we just use WSS for our corporate web site" and "What are the benefits of MOSS for WCM if I can do it with WSS"