Actually; the 'technomancers' are people that are otaku-like, in that they can access the grid without the use of a cellphone, and they use their physical stats as their firewall, attack utilities, and the like.
you buy points in resonance just like you would buy points in 'magic', Otaku aren't being 'born', but there were a bunch of them created in the most recent crash, when the trix' wend offline for like a day and a half, and a whole buncha people were 'trapped' online. aparently that ordeal caused them to 'listen' to the matrix, and now there's no more fading or any of that jazz. they are just out there, talking on their cellphones, only without the phones.
-RuskiFace the Pirate