Are you from europe? If yes, when you accept the new agreement, you will be going to not with Google Adsense stated in USA, you will be with Google Adsense Irland. I don't know from which country you are, this may affect your tax. Example I am from germany I don't have to pay VAT, because its a service outside europe. So if it comes to Irland, I don't know if I have to pay the VAT because Irland is within the europe tax market, so it could be possible that I have then to pay
Fair point to be made, as I also got an email changing it from $ to the £. I know in the UK you can just call up the Trading office to find this stuff out. Not sure hot to do it in Germany though. Viel Glück!
If you get when you log in to adsense, to accept the new local placement change of Google Adsense, then soon you have to change from Google USA to Google Irland. Right now you can decide, but I read on their mail that soon europe is going for Google Irland. So you can decide for now, but soon you have to. @jskapur, Just interested, how it is in UK? Do you have to pay VAT?