i think Rev. A is like 3.5G. the 4G stuff i think would be WiMax for sprint and verizon will use LTE for 4G.
The 3G announcement you here often are for the GSM (AT&T / Tmobile) networks getting 3G data.
"A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila." - unknown