The spotlight on Sprint's MiFi has definitely faded since the launch of the Overdrive and EVO 4G -- both of which can kick it into high 4G gear when in range -- but Sprint subsidiary Virgin Mobile is bringing Novatel's groundbreaking mobile hotspot back into the forefront by taking it to the prepaid world. What that means is that you'll be paying $149 for the MiFi itself -- contract free, naturally -- plus any of a number of prepaid data rates ranging from $10 for 100MB all the way up to $60 for 5GB. It's said to be launching next Monday online and in Best Buy and Radio Shack locations -- so if you're an occasional data user, th