I see the value in using progressive enhancement in web development and I already use it regularly. That said, almost every website I've seen that strongly advocates progressive enhancement is a website with no images that has a div for a title and a div for navigation -- in other words, really basic (and boring) stuff.
Do you know of any examples of sites that use progressive enhancement to great effect? I love poking around disabling all sorts of things on sites to see what they look like but I rarely find something that degrades beautifully. I'm looking for something with images, dynamic content, tables, embedded players, or anything somewhat more tricky to develop than just blocks of text.
I'm still waiting to find that site that displays perfectly in text-only browsers and still blows me away in its full-featured glory ;)
Amazon site degrades quite well.
If JavaScript is off, then it is still possible to browse through product pictures (with full page reload of course). If JavaScript is on, then the nice Ajax improves the experience.