Yahoo has a huge search engine. Yahoo has image search. Yahoo has pop-up blocker. Yahoo provides email which gets way less spam that Hotmail. Yahoo has a news service that includes Reuters and A.P. Yahoo has games. Yahoo has a radio station thing (that used to be cool before you had to pay for high-speed sound). So what is it about Google? It's always Google search this and that. GIS and so on.
BTW, I hate MSN and Hotmail and that crap. Always a pain signing in, spam out the wazoo, and for me it always cuts my Internet off.