What really just bothers me about the new rates is that if I use 2.1GBs, I'm automatically paying for that extra .9GBs I'll never use that month. I don't tether, just do a lot of slacker streaming, internet surfing, RSS feed reading, facebooking and some youtube watching. I currently use about ~1.7GBs/month on average, going to about 2.1-2.2GBs sometimes. So, am I that 2% that illegally tethers, and makes your network slow? I like to think not. I use it like everyone else, and one thing I hate the most is an inconsistent bill, which I could get depending on my usage for the month which is based on a variety of factors. Did I drive into work instead of taking carpool/BART and etc. If it was 3GBs, you'd probably wouldn't hear me complaining TOO much, at least for the time being. Just wait until we all start using more data and then see how you feel about those rates. We're just at the tip of the iceberg for data connectivity in my opinion, and data usage is only gonna go up, and not down.
Oh, and one more thing. Chances are when you have 3G coverage, its still using the 2G network to make your call/send texts, which is why you can surf the net at a decent speed at the same time. So no 3G voice, or VoIP business going out to my knowledge at least.