I don't know of a mobile version of this site but google has a tool that will convert any site into a mobile version. You go to the google site and type in the url of the site you want to convert. I tried it and it's so-so.
I've tried a couple apps for the iPhone just recently, and most don't work with this site without bothering Joe the webmaster. The one that does doesn't work very well for this site or ET.