OK, as apparently .js is the defacto thing to build cool sites, I for one will be left out here.<p>On sites not known to me, I typically block most (read all) .js at first, just to make sure that these sites do not leak too much information about me to external tracking tools, advertisers or the like.<p>So using .js seems to me a bit problematic in regards of people not enabling it by default (but this is an absolut minority, if I look at the stats of the sites I analyze).