Or is it?  I was seriously hoping to break the megabit barrier with this, but it doesn’t look to be true:

The card operates on the current Sprint Power Vision Network and will support faster average download and upload speeds (450 -850 kbps and 300 – 400 kbps, respectively) of Sprint’s upgraded network when it becomes available. 

So not only does it not break the barrier, but the network isn’t there to use it yet.  OK, OK… False alarm.  Go back to what you were doing.