Please don’t tease the luddites.
Isn’t that generally true for most browsers, and for that matter, most software products? That security updates aren’t provided indefinitely for older versions? How is Firefox unique?
The length of time. FF2 was killed after only 2 years.
I’m glad I wasn’t drinking something when I clicked that link, else you’d owe me a new keyboard! Apparently one of their goals is to “Get the W3C standard changed to fit IE6.” That’s bloody brilliant. The helpful “Download IE6 Now” wizard is the best. 
Seriously though, IE6 is terrible for a lot of reasons besides just modern web standards. It’s also probably the most insecure browser out there, and if you are making regular use of it on today’s web, there is probably a 120% chance that your computer is currently owned by the Russian mafia and being used to send Viagra spam to old ladies.
By default, there is a Tools button/menu item in plain sight. Clicking it displays the same menu you’ve seen for years. From that menu, you can select Toolbars, and re-enable the menubar.
Basically, they assume you’re willing to look around long enough to figure these things out yourself because they aren’t all that different.
As horrible as IE6 was, you should be happy that they’ve made it as easy as it is to transition. People are creatures of habit and resistant to change, but interfaces evolve along with our understanding of human/computer interaction.
You’re going to have to learn something new every once in a while, sorry.
It is blazing fast and uses the Mozilla engine so it’s similar enough to Firefox.
I’d just like to point out that it’s now “Firefox 3.5”.
HTML5… yum.