Why not just "Paul"? If I'm just browsing, I'll get turned off by what appears to be worship. Shouldn't communities be more open?
This isn't worship, it's just an established convention. It may be a bit in-groupy, but so are using jargon like calling this "Hacker News"; you have to at least know that "hacker" is used in the sense of neat technical tricks, rather than the more mainstream sense of breaking into other people's computers.
Heck even first name initial plus last name is a bit dated.
@Sevzinn, if you look at any source code or languages for that matter (Arc) pg has written, you'll see small labels used as opposed to long descriptive ones. Succinctness wins over verbosity.