WynnMiyabi
i find that newb, with an E W is for when someone is new at gaia, ex: i'm new, where is the forum?
but n00b with 2 0's, however, is for when someone is a troll/emote spammer /cyber f**/ all around jackass, ex: OMGWTF Y U NO GIV ME UR GOLDZ?!!?!?
I like this definition, though I would probably expand upon that by showing the similarities and differences with the two even deeper.
A newbie, or newb, is an individual who is new but eager to learn - and fit in. While he or she will make mistakes, these are usually quickly corrected and he or she will eventually grow into a well-rounded individual, maybe one day well-known for his or her own witty personality.
A noob, however, is a corruption of the above individual. While new (or resembling someone new), they are often arrogant and self-important. They believe (or pretend to believe) that they are the greatest person alive, and when their mistakes are pointed out, often respond (rather than with a "thank you" and maybe "how do I move it?" which, while naive, is also well-intended) with "STFU AND GTFO OF MY FORUM!" Or something to that effect.
Noobs will beg, yammer on about their lives, etc. no matter what forum they're in. They'll inevitably "bump" even if it's unnecessary - scratch that, ESPECIALLY when it's unnecessary. They are a plague upon society, the internet equivalent of those idiots who talk throughout movies - often not even about the movies - and very loudly.
(This made me think of something very fun, BTW - next time you go to the movies and someone's talking incessantly, shout to them, "Ess tee eff yew, noob!" If that doesn't work, throw a fireball at 'em. And by fireball, I mean those red hot cinnamon jawbreakers. Though that might just get you in trouble. Okay, nix the fireball.)