Microsoft.News from Microsoft camp, the first day sales estimates are in and Halo 3 topples Spiderman 3 and Harry Potter and the Deadly Hallows as the biggest single day record holder. This means the biggest entertainment launch in history. This is not the last number since the UK and other countries are not included in the sales total. Once the worldwide sales averages are in I am sure Microsoft and Bungie will have several hundred reasons to celebrate.