Here is an interesting comparison of Cortana over the course of the 4 halo games:
PTesh adds his dulcet prepubescent tones over the top of one of the new trailers for weapons...
Try upgrading your browser to Google chrome (you wont regret it). There is probably an IE...
Webmaster Cereal- WEB-O'S
Level: Mombasa Streets
Inside the first building your going into on the begging mission on the campaign, before you exit into the courtyard full of grunts, there should be a couch to your left, around said couch are various breakfast foods, i.e: orange slices, a bowl, a plate and a spoon. Along with these is a box of cereal with the webmaster on it, and of course a bowl of the cereal. The box reads: Web'O's "Your mom loves 'em!" Sorry, but I don't have a picture of it. The easter egg is very easy to find though, good luck!