Sorry for bringing up old posts, I have to catch up on some things.
I've tried that about half a year ago but it wasn't stable at all. ED started but loading random applications caused my N900 to reboot.

So if you got more promising results than I did would you mind sharing your image? If it actually works we might expect gains in performance up to 20% over armel for some applications (although to be realistic we wouldn't see any change at all in most applications).