Thanks, Sean. I decided to just sign up with a subdomain to check the service. I only want this for a personal site/blog/playing with CMS's, so I will probably be happy enough with zPanel.
One comment, though: I think that the site design could be improved. Going to
http://www.glacierhosting.com/ brings up a page that says only "Welcome to Glacier Host!". Why not show the home page up front? I initially thought the site may be down or something. There are also no details of hosting packages, which hosting sites typically dedicate their home page to. I eventually clicked on the order form, and got some minimal details, and also found the free service. Knowledgebase, where I thought I might find some more info about the hosting packages, is pretty empty.
After I registered I got a message (took me a bit of time to see it) how to login to zPanel and telling me that my username and password are in my profile. Couldn't find them so sent a message back.
In short, not the most streamlined process.