Just check my phone specs using a really cool app called System lite. Before 2.2 update, my clock settings was at 550mhz, now its at 600mhz. Im guessing google or Motorola know that this phone could be push more faster then it was intended. They probably didnt do it because of the heat issue, otherwise what is to stop them from pushing it to 700-800 mhz area. Well see on the next update i guess.