Possible reasons why the 360 doesn't have a web browser.

[Seraphic_Sixaxis]

Well, as far as PS3 goes its automatic an-ti virus.

you've got to go to some pretty "iffy" websites to fuck it up lol.

But since its the 360... would you really want IE as your only option? it's so shat i even prefer PSP's shat brower over IE. -.-