I'll repeat to Joey... when they support Mozilla, I'll probably go there. IE is a waste of filespace.
On the contrary, as IE is the Windows shell, it does not take up any extra space. Sure, the shell could be smaller without it, but then it wouldn't have all the built in internet technology. 90% of the apps you download for Windows that use the internet use the IE lib.
I used to be anti-Microsoft and anti-IE and only use Netscape/Mozilla, but eventually switched for many reasons. For one, many sites were IE only, yes, I used to blame Microsoft too, but the fact is, it's really the webmaster's fault. If the webmaster decides use the built in IE features instead of being creative with their scripting to make an equivilant for all browsers, it's their fault. Second, I used to think it was a monopoly how Microsoft included all of this stuff such as IE built-in. However, after a number of reformats, I began to really like the fact that I didn't have to reinstall so much as so much was preinstalled. Honestly though, in this day an age, how can you expect an OS not to have built in internet? All the useful Linux/BSD/etc. distros have built in browesers, as do Macs, etc.
Also, because IE is the shell, it just opens up taking up on more space from the page it's viewing and a few inet routines. Mozilla on the other hand will be extra stuff running in the background when you're not using it, slows the boot time, and is slower to load. Plus, I don't like tabbed pages, not XP's optional grouped taskicons. I like my computer clean and simple. If I have a perfectly working browser, I don't want to waste my memory on another.
I also hate skinned apps such as many third party browsers and such. The only good skinned app was WinAmp2. WinAmp3 is too bloated and slow! WinAmp2's skinning was fine because it was just a flat surface with buttons. Something like Netscape on the otherhand has all that custom controls for everything from buttons to text fields. That to me us just useless wasting of memory. All I want to do it browse web pages, I don't need a fancy looking browser. All I need is a simple back button, not a fancy animated waste of memory, and so forth.
Geez, I kinda got off track...my two cents though