Things that piss me off

Proprietary cell phones. You buy a PC or a Mac, you enter an open wireless network, and it works. If you enter a for-pay network, you sign up, pay, and everything works.

Buy most cell phones, however, and the experience is entirely different: the thing works only with one carrier's network. Want an iPhone? Better love AT&T. Want a particular Windows Mobile 6.0 smartphone? Better plan on changing to its carrier.

Yeah, I understand the history and the business model, but plenty of useful alternatives exist that would not cost the carriers money.

Different phones from different vendors, different feature sets on the same phone from different vendors--it's stupid, and it pisses me off.