I think "excited" is a bit of an overstatement, but I am interested in seeing it when it comes up. (Wednesday?) I definitely approve of making the Party system a part of the Dashboard, seeing as developers have been so sluggish in working it into their own games... and I think Netflix subscribers are going to find it seriously useful.
It's definitely prettier, with or without the X-Miis (which I personally will probably skip; I don't necessarily wish to have an anthropomorphic emblem) the esthetic is much cleaner and easier to read.
Watch for the disc copying, though, as folks on NeoGAF have found it might not lead to a performance boost depending upon the title. (Apparently Fallout 3 gets faster load times, but Halo 3 gets slower loading when pre-loaded onto the HDD. Go figure.)
It'll be interesting to see it in person, anyway. And remember, if you think NXE sucks you can always use the "guide" button to bring up the old format dashboard.
-- Steve