I'll probably add more to it, so consider this version 1.
Update: Version 2 now up. 8 names added. Answers here.
ACROSS
3 Proud Texan.
4 Costco slave.
6 Balding brit.
9 Redneck in disguise.
11 Limey with a motercycle.
12 Texas rules.
14 Accutane poster boy.
16 Rumored to be names Juanita.
18 Half black half ^_^.
21 The worst name here.
22 Suggesting the horror of death and decay.
26 1173 Park Ave Alameda, CA 94501
28 Graphic extraordinaire.
30 Resident of Wales.
31 Swedish metal enthusiast.
34 Attends the University of Toronto.
36 The Netherlands prince.
39 Fat, pasty white canuck.
41 Dude who used to run the IRC server.
42 Swedish lady in wonderland.
43 Simon.
45 Richard Simmons #1 fan.
46 Surfing hawaiian who hates caucasians.
47 Author of robozni.
48 Banned more often than not from IRC.
51 The prettiest pony in all the land.
52 Majoring in Chemical Engineering.
53 Synonym for hot.
DOWN
1 Goth.
2 Northern California music critic.
5 Often jacks merchandice from CompUSA.
7 Anime loving Canadian.
8 Head of semicolon-zero security.
10 Russkie.
13 Old school swede with an uncanny resembelence to mr_lee.
15 Edmonton cool cat.
17 The fattest TFC class.
19 Looks second only to his sister.
20 Can often be found prowling playgrounds.
23 Probably smoking weed right now.
24 Hated only slightly less than his retarded friends.
25 A seriously gr8 guy.
27 JFK's old college roommate.
29 Resident mormon.
32 The only black guy around.
33 Tasmanian dingo hunter.
35 Attends Northeastern University.
36 Pray to him.
37 Drives a 1987 Chevrolet station wagon.
38 Won a vacuum cleaner at a gaming event.
40 Crazy Australian.
44 Killed by darkies in NYC.
49 It's the fkn ___.
50 Small korean girl -or- obese truck driver.