It's an easy solution for where I live.. everybody's got gloves like these ones = http://farm1.static.flickr.com/158/416637197_99fdcf5545.jpg
As far as working temperature condition for your iPhone.. hmm the actual unit will work (take calls) way under those limits; it's the touch screen that will have problems being precise.
We still buy iPods year after year because that's the human way of doing things. We want the latest and greatest and frankly I wouldn't be stuck dead with a 1st Gen iPod, neither would Steve!
They WERE great products but now are obsolete for a reason. It's like saying that my 1958 RCA Television still works great why change it? Well for starters, I want color, I want more scan lines, I want a flat screen.. no no no better yet a Plasma, yeah! Gimme HD!
See? So when the next generation iPod, iPhone or iDevice comes out, expect the masses to run out and get one, YOU and ME included ;)
Mac
www.macishere.com
iPhone Bytes
Do We Only Buy iPods Because Our Poop Stinks?