Making it seamless would be awesome. Is there a way to preload the site like Flash?
lol! You know, instead of writing URLs down and losing the scraps of paper... there is that thing in all browsers called "Favourites!!"
I agree that moderating the tutorials would be better because there is no telling what kind of junk someone might upload.
I bet your site will become a useful resource for many ppl... and potential competition for HTML Center!