If you check your Apple software update today, you can see Apple's jsut put up an update for various Novatel EV-DO and HSDPA cards. Why is this important? Because we know firsthand how good the Sprint Novatel cards performed at CES.
Among the newly supported cards are the Merlin XU870 for Cingular's HSDPA, the Merlin EX720 and U720 for SPrint (both Rev. A), and the XV620, V740, and U720 for Verizon (first is Rev. 0 and second are Rev. A). Good to know all these cards are available no matter which provider you choose.