http://www.rottentomatoes.com/click/movie-1123236/reviews.php?critic=columns&sortby=default&page=1&rid=1168298 To every creatively frozen, summer-movie ice age comes a little heat lightning, and these gray dog days it's Danny Boyle's 28 Days Later. On one hand a seat-o'-pants digital-video quickie designed for blunt trauma, and on the other a veritable index of classic genre-stuff, Boyle's film creates an acute sense of movie-viewing danger. You're never sure that what you'll see will be completely safe and blockbustery. Because it's cut-rate, star-free (supporting players Brendan Gleeson and Christopher Eccleston are as close to marquee names as it gets), outlandishly edge-conscious, and 100 percent British, the movie has a frontier charge built...