The jacks that I'm using are actually motorcycle jacks that Clive supplied to me. They are rated at 1000lbs each and Clive says he uses two to lift one end of the car. The jack is called the Black Jack, they are here at the bottom of the page,
http://www.tufflift.com/page14.htm
I have only played with one of the jacks lifting just one end of the Cobra and it lifted it no trouble at all (I did use the rattle gun to raise and lower though because I'm a lazy bastard). The jacks look like OEM style scissor jacks that most cars come with as standard, but they have taken some serious steroids.
They come with various attachments that aren't shown on the website and look quite tough. He'll do a pretty good price on them too, if you're nice
As for the lift itself, I really haven't played with it too much yet (and probably won't for a while yet) but I am very happy with it. It's very well built, looks extremely strong and lifts higher than I expected, (I just need to raise my roof...).
Any other questions just let me know.