E.g.: http://gameaccess.co.uk/830-crown-ps2-24ghz-wireless-controller.html I've seen a few of these around, but does anybody have any comments or experiences regarding them? I'm thinking of purchasing one.
http://www.amazon.com/Logitech-PlayStation-2-Cordless-Action-Controller/dp/B0001VNNE8 I've handled the above before and they're pretty good, IF you can find them. One is floating around at a nearby thrift store but I can't find its receiver unit. Not nearly as 1:1 with the official controller as the one you've linked but frankly I've found DualShocks to be a bit cramped for my large hands. XBox Duke controllers are extremely comfortable for me.
Yes, the best wireless controller avaialable for the PS2 is the Logitech Cordless Action. I haven't used my original Dual Shock 2 for years.