OS, wise no, nothing major, but the hardware is. But then again that's the whole thing about N800 vs. 770. The truth is even though OS2007 may not be that much difference than OS2006, but who know what about the OS2007.2 The software can only do so much, if the hardware doesn't allow it, then there is nothing you can do much about it. The truth is 770 is somewhat underpower to do a lot of neat stuff. Maybe and let me emphasize on maybe, N800, if they rewrite some of the code, tweaking some of the stuff out, youtube might actually be watchable. All it very need is 15fps to be watchable, and 23fps to be played smoothly. I was looking at top, and the system is running at like 90% CPU.