2channel, in the 52nd thread on LS (i.e., now over 51,000 posts) is having a long discussion about which browser Konata is using to access 2channel in episode 4. One person said she was just using IE, which puts a greater load on the 2channel servers than using one of the many specialized 2channel browsers, so she was not a true otaku. But people have demonstrated with screencaps that she is using one of the browsers. The hotly debated question is which one.
Screencaps of Konata on 2channel and of a couple of the 2channel browsers:
Personally, I use 2ch Tsubo on top of Firefox, so that I can use the rikaichan dictionary. Does anyone know if there are other browsers that would work with Firefox that way?