I've been playing around with Macromedia Contribute 2, which is now available for MacOSX. It seems like an extremely useful utility for editing existing websites, but falls short for creating them. That's a reflection of the market they're looking at - newbies editing content (change a phone number on an intranet, update an image...).
For that, it rocks quite nicely. I'm curious to see how/if it mangles a modern web page, since it seems to have some heavy table editing tools, but nothing for divs or css...
I've been pointing it at a dummy page to see what it can do. It handled the image upload and display attributes extremely well.