Dominion.isotropic.org was down for a while last night, and when it came back up, I was delighted to see two buttons next to the usual field for my nickname: "start (images)" and "start (text only)". Starting a game with a friend brought me to something like this (I started a solo game for the following screenshot):
From the FAQ:
If you've been here before, the card images are new. They aren't the ones from the real published game — I don't have permission to use RGG's art — but Donald X. kindly provided the images he used on the original prototype versions of all the cards, so you can see how it used to really look. The basic card images (basic treasures and victory cards and curses) I made myself.
Text mode is still available. You can even switch in the middle of a game by reloading your browser and clicking the start button for the mode you want; it should rejoin your game in progress in the new mode.
It takes a little while to used to the different images and new layout, but I like this a lot. The pop-up card text is welcome, too.
Given the quality of his implementation, Doug seems like a shoo-in for creating the eventual official online version of Dominion. I, for one, would be happy to support it with my hard-earned money!