It's a new area so usage may vary- you'll find surf on the net used sometimes, though the tendency seems to be to use no preposition. I actually don't hear the verb surf used that much nowadays either- I don't know whether other people hear it as much as before.
It's a new area so usage may vary- you'll find surf on the net used sometimes, though the tendency seems to be to use no preposition. I actually don't hear the verb surf used that much nowadays either- I don't know whether other people hear it as much as before.