I bought the 770 back in the day before it was released, but they kept delaying the release date, so I canceled the order.

Then when I saw the 770's so cheap recently, I was ready to pounce, but ended up getting the N800.

People have said how slow the 770 is for switching between aps - something I do A LOT of, and support for SD (and now SDHC) was another big motivation for me.

But if you don't switch between aps a lot, and don't need a lot of storage, I say go for the 770!