[bork1]

One downside is that it basically renders the back button useless. I ran the examples you provided (which were great fun!) and when I tried to get back to hackernews I realized each step in the animation had been added to my browser history

[zuppy]

you can use replaceState for that and back will work fine

[tracker1]

I didn't really look at the code, mostly because I just found the idea interesting as I hadn't considered it. Kind of surprised that it's not using the history api to replace the hash.

[bork1]

Oh nice; good to know that there's an easy way to get around that.

[codedokode]

Maybe browsers should go back not to previous URL, but to previous domain.