This is exciting because people are beginning to build cool libraries around HTML5, not because of the details of the games themselves.

Well, it ran great on my iPhone.

Slow but still playable on my 3G. It's probably not too shabby on the 3GS.

I really hope Apple have put some work into Mobile Safari's JS engine in 4.0. HW accelerated canvas rendering would be nice too.

Yep, totally smooth on the 3GS. Blows the hell out of those crappy Java games I played on the phone I had before my iPhone...