If you can live with using Java or Python with Google App Engine and are handy with Eclipse, http://Appspot.com is free for moderate usage.
Here is some more information.
http://code.google.com/appengine/docs/whatisgoogleappengine.html
App engine can host simple HTML/XHTML files with CSS or you can host a full blown web 2.0 application with servlet powered AJAX, then scale it as large as you like with no extra work. Just my 2 cents.
"You can serve your app from your own domain name (such as http://www.example.com/) using Google Apps. Or, you can serve your app using a free name on the appspot.com domain. You can share your application with the world, or limit access to members of your organization."
They also offer free SVN services on code.google.com.