Ah.. an upgrade to the good old Visual Pinball link: visualpinball.com is the new link: www.futurepinball.com
Visual Pinball is great for low end or old PCs and there are a wealth of tables you can get for it (relive your old pinball days today)
Future Pinball needs a decent graphics card (GForce 6600 GT) and has a rather limited set of tables - which is not supprising as its rather new.
All hail the future.