Well I agree with all the stuff said here about the FF fanbois, it's beyond beginning to piss me off to be honest, Yes, FF is a decent browser but it's not without it's flaws as many claim it is.
Opera is also a very usable browser.
Finally, the flamebait if you will, IE isn't that bad either. I use it, I'm not going to convert because someone badgers me about it everywhere I turn. IE6 has been targeted because of its popularity and so will IE7 but that doesn't necessarily mean they're shit. Sure, IE isn't perfect either but come on - none of these browsers are, they're something related to the internet and any form of internet client software is vulnerable.
The only problem I have with IE is how closely it's linked with Windows itself but besides that it's a perfectly usable browser.
In reference to the thread though, I don't particularly like the idea of IE 'skins', I've tried Deepnet and it works but I think I'd just stick with IE.
As VaKo said though FF isn't necessarily a viable option for a corp environment so hey, use what does the job, right?