Here in the UK, O2 was Apple's partner operator for several years, and it remains the default choice for a lot of us iPhone users. With the new emphasis on tethering in iOS 4.3 via Personal Hotspot, many of us O2 users (particularly those of us with Wi-Fi iPads) have been clamoring for better tethering plans (as Ben Sillis notes, O2 has recently fallen behind rival networks in terms of its value for money.)
Today, O2 is announcing new tariffs (note that in UK jargon we