Ok the announcement was really thin on info, but some trawling of blogs indicates that it's got the two most important on my wish-list compared to the 770: Twice the amount of RAM (now 128MB), and TWO SD SLOTS. Excellent. The only thing I slightly dislike is that it's physically longer than the 770 (which was just barely not too big).
However, one important question remains: Now that it's got SD support, is it also SDHC (aka SD 2.0) compatible? Or are we stuck with 2GB cards?

(close to buying one! Got to get the above answered first..)