A quick follow up for anybody who wants to try the WMS server. Start by publishing to the web using Server in the usual way.
If you want to take a look at what the WMS server does, launch a Manifold session and create a new data source that's a WMS server. For the server URL, add /wms to the end of the URL for the web page served by the HTTP server for the WMS URL. For example, if Server is serving an HTTP page to http://127.0.0.1:8080, the WMS URL will be http://127.0.0.1:8080/wms.
This is what it looks like using the "eclipses" example web server page in the What's New page...
Since the PNG images served by the WMS server have transparent background, if you want the background color to look like that in the original, create a map that uses the WMS map image as a layer, and then set the background color in the Layers pane to what you want (I used the eyedropper to pick the color from the web site in a browser):
The image that you see in that Map Image tab above is coming in from the WMS server. With the new capability, if you have an HTTP web page, you also have a WMS server page.
Note that I copied the map image from the data source to make a local copy in the project, using the technique in this topic. I usually do that even when not necessary, to keep the names of served layers short.