This is not exactly about web advertising, but I thought it was interesting to talk of the two main (and only?) dot.coms that today have merged. I'm talking about Buongiorno and Vitaminic, Buongiorno is one of the main web and wireless advertising providers in Europe, with Vitaminic is something like Mp3.com, for what concerns music.
You can read the press release online (pdf). This time it's in English :-)