Looking though youtube there is another of smb's hacks but this one the graphics are amazing there are 6 video's in all I watched though them all the hack is named Super Mario TKO which you can find on http://www.smwcentral.com if you want to download it and play it.

Here are two of the video's and there is another users who play the full game in parts on youtube but I will post the two cause it would take me sometime to post all the links one of the hacks that I do have is Mario Forever that is awesome & great hack which am not finished.

There are other places that you can play Super Mario bros 1,2 & 3 am still searching for more website and of course to play them you have to have Sun Java to play cause if not you will get an error or it won't load.

http://www.youtube.com/watch?v=Har4XXCOCyk (Let's Play Super Mario TKO - Part 1)

http://www.youtube.com/watch?v=3hFs2cKJ2jg (Let's Play Super Mario TKO - Part 2)

Another hack is Kaizo Mario if I spelled it right is one that I have no played yet if you are still on you tube two of the users Proton Jon and SSoHPKC are two of the users that did that hack Proton Jon is one of my favorite and all the commentary makes my sides hurt when I laugh.

Heh, another hack.
I did see the videos, and the graphics aren't half bad. I like the enemies form other games bit too.
Neat idea, but it's been done before.
Also, this belongs in the Video Games forum.