Need suggestions for website/webpage monitoring for changes when rss isn't offered?

Anyone have experience with feedit, feed43, or any home-made methods of creating feeds for website that don't offer RSS? I know little to nothing about HTML, XML, etc - so when I tried feed43 I got pretty lost. I made some sort of feed and got it into Google Reader, but I have no idea if it's actually going to work (ie, alert me when the website I'm monitoring has been changed).

Any suggestions?