IE 6 I believe. I kinda like things and stick to them. I only recently upgraded my AIM. The only thing I would consider upgrading to is the new IE, but I have heard bad things about it, and oddly enough, I didn't like the tabbed browsing. I had FF for one day, and went back to IE.

Also, as lame as it may sound, I don't like doing what everyone else does or has lol. With most things. Like Ipod, FF, etc.