I was reading an artical in Wired today, that was talking about this site that emulates Pinball machines, according to Wired, "More then 1,000 machines have been virtually re-created"
I have not taken the time to try any yet, but if you want to the site is VPForums.com ... although you have to sign up with there forum to download them.
BTW Wired is wrong only 442 tables are up for download.
[Edit] I noticed they have two Super Mario Tables...