Newblets? That just seems heinous to me. I don't know, i'll probably go postal if someone referred to me as a newblet. XP
I prefer to say newbie, as in Scrubs. Because Dr. Cox is totally awesome.
Newb is when i'm just too lazy to say newbie, which i pretty much am all the time.
n00b is a flaming newbie, that i actually like because they are quite the challenge to deal with. Shouting matches are very fun to have with them. Though they have a stubborn behavior that augments the bad connotation of their name, they do make things interesting.
c'mon, what's funner than somebody to hate? (that you don't personally know)
noob is just the usual prejudicial term used for well, newbs, but it also gives you the name because you haven't made a significant name for yourself.
Note to all of the noobs out there: don't think of it has significan't, think of it as significan!!! 
"...You might think I'm losing my mind, but I will shy away from the specifics..."
gamertag: path090