I am not really a data hog. I have my own cloud and everything for movies and music but I rarely use it- my family uses it more. My wife really uses the Netflix and tethering, not me. When I do most of my app downloading I am at home and I use the wifi for extra speed.
With that said, I am not gonna give up an unlimited plan easily because I don't want usage fees. Back in the RAZR/EDGE days one time because of tethering I put together a $3300 data bill!!!!!! I never want that to happen again, but I also don't want to have to monitor my data usage. Throttling, as long as HTTP isn't cut back too much, is a perfectly acceptable middle ground to me. That is just my opinion for mobile, on broadband I use 1TB on average a month so I don't accept any caps or throttles from my provider and I would switch to avoid them.
What does make me upset about AT&T's announcement is that they seem ignorant to the future:
Typically what puts someone in the top 5 percent is streaming very large amounts of video and music daily over the wireless network, not Wi-Fi. Streaming video apps, remote web camera apps, sending large data files (like video) and some online gaming are examples of applications that can use data quickly. Using Wi-Fi doesn't create wireless network congestion or count toward your wireless data usage. AT&T smartphone customers have unlimited access to our entire Wi-Fi network, with more than 26,000 hotspots, at no additional cost.
AT&T is basically saying they can't keep up with streaming video and their solution is you use their damn wifi hotspots. These carriers need to realize that the number one thing pushing 4G technologies is a want for streamed video of some sort (Netflix, video calling, etc.) and if they don't push back these caps considerably (like 10GB) and build networks to accomodate the demand they will get grassroots political pressure to regulate the industry more.