I also missed how to save the configuration (I was trying to go to floppy) - no other feedback or options I saw on the webgui for saving (other than backup/restore - which I did). Only after googling did I find this thread and was able to select the "option 98" to get the save made to the floppy disk (then used the restore option to save prior work to the floppy).
Could help usability a bit by keeping the save option "98" active later (maybe I want to save to floppy now but a week from now want a USB configuration) and having something clearly on the Webgui too (a big "save configuration" button). After the basic console setup of the NICs enough to get a client machine connected I'm looking up the webgui to finish configuring.
John