How can iPhone be used when wearing gloves?
Solution 1:
The screen is a capacitive touch device so it depends on a conductive item contacting it. A number of companies have produced gloves with appropriately conductive finger pads.
Solution 2:
I like these lambswool gloves by Dots. I imagine they use some sort of conductive thread woven in the fabric, and they're quite affordable at $15.50 to $20.
Solution 3:
You could be like the South Koreans and use sausages.
Solution 4:
Another solution is to use special stylus like this: http://www.tenonedesign.com/stylus.php