You mean Digimon (Our War Game)?
Oh yea... that was great indeed... lol joke aside, Summer Wars is an exhilarating film that Digimon movie could have been. And I still feel the plot was so, incredibly FORCED (yes I mean it with capitals). The introduction of the digital world, the vague King Kazma and the origin of the antagonist too, or the digital premise itself... UGH. If it was a Digimon movie, they'd save precious screen time trying to explain all that techno crap they cramp into the 114 minutes and focus more on a more consistent plot, exploration of the various characters or heck, cool fight scenes. Asides all my bitching, the animation is great so I can at least be satisfied on that.
And oh, I agree wholly with Usagi Drop manga plot and ending...