Fantastic
Post up your Arudino code because if you Google around you'll discover that this book and that example has had quite a few people scratching their heads.
Just remember: this is no Microsoft Internet Information Server or Apache web server. It is more like the old SitePlayer (only SitePlayer was a lot more polished):
http://www.netmedia.com/siteplayer/webserver/sp1.html
It has no SSL. It has no authentication as you are using it.
If the browsers change dramatically you will need to alter that code.
Make sure you test that with all the browsers you need to use it with.