Here is a link to a blue one.

Neutron Star, a pinball machine prototype by Atari. Pretty cool and fun to play although the bonus counter had a logic flaw and sometimes 'hung up' in an endless loop. Only two known to exist, this one belongs to Dan Kramer.

Freeze, another Atari prototype with a Tetris-like feel to it. Great graphics (a la Donkey Kong Country) and very unique characters. Too bad this one didn't make it, I feel it could have become quite successful.
More pics: dedicated cabinet and screen shot.

This is Jerry Jessop, showing off the CX2000, a useless attempt to lower production costs of the 2600 with built-in joysticks (ouch!). In the background is the failed attempt to market that thing to kids (= blue color).

Here is Jerry with a Marshall Rosenthal (spelling?) from the LA Times (???) who came to report on the WOA. Cool! Both of them hold the the remote controllers of the CX2700 (???).

Dank was selling holographic backgrounds of COSMOS (he must have at least a few hundred of these) and copies of the original sales brochure.

Here is COSMOS, an Atari tabletop prototype (only one known to exist). It had an LED matrix and 'cartridges' that had holographic backgrounds. Planned games were (among others) Space Invaders and Asteroids. Some reviewers complained about the distracting backgrounds and the thing was scrapped. Kind of cool, but the LED matrix looked pretty coarse.

This setup demonstrated the Laser Disc from the Firefox game (remember that one?). I never liked the game but it was kind of cool to see the scenes in linear order. Typically a scene where the player had missed the enemy would be followed by the same scene where the player had hit the enemy plane which would blow up in a big explosion. They (B & C)  wanted $50 or $60 for the Laser Disc.

There was also a museum (extra fee of $1 for entrance and exhibition catalog - $1 well spent!) with all kinds of prototypes and rare/unique items.

Here are the two guys who guarded these treasures.

Some of these items a lot of us had never heard of :)

This is how it looked Friday night, boxes and laundry baskets full of goodies were brought into the room and by Saturday it was filled with an awesome collection!

23 are the CX-2000 VAL (for Value) protos from 1981. A useless precursor of the Atari 2600 jr. console with built-in joysticks :)

58 Atari XC11 Cassette Player
59 Atari XC12 Cassette Player
60 is the Atari XF351 3.5" Disk Drive proto from 19?? intended for the XE computers.
61 is the XTC-201 Thermal Color Printer proto from 19??, also for XE computers.
63 is the box from the Atari Space Invaders Handheld from 1980, the game itself was probably not completed.

50 Atari 1200XLS proto from 1982.
51 Atari 65XEP proto from 1985.
52 Atari 800XL (unreleased) from 1983.
53 Atari 815 Dual Disk Drive (unreleased) from 1983.
54 Atari 1040ST
55 Atari CP/M Module for the XL computers.

56 Atari Portfolio DOS palmtop (I have one, they are pretty cool!).
57 Atari TT030

5 Coleco Telstar Arcade (1977)
6 Emerson Arcadia 2001 (1982)
7 Entex Adventurevision (1982)
8 Entex Select-A-Game (1981)
9 Vectrex with Light Pen and 3-D Imager (1982/83)
10 Fairchild Channel F (1976)

11 Magnavox Odyssey from 1972. The very first home video game system designed by the legendary Ralph Baer. It had colored overlays for the TV screen.
12 Magnavox Odyssey 2 from 1978 with different sets of controllers. Similar to the European Videopac or G7000.

20 Atari 2600 with nice box
21 Atari 2700 prototype - with RC Joysticks. Codenamed RC Stella (1981).
22 Atari 2800 (1983), targetted at the Japanese market + a few game boxes.

27 CVC GameLine Modem for the 2600 (1983)
28 Dynacom Megaboy (199X)
29 TV Boy (NTSC - 199X)
30 RGA International Video Game Brain switcher (1983)
31 Sears Telegames Arcade II from 1983
32 Spectravision Compumate from 1983

34 Starplex Deluxe Video Game Controller
35 Atari 5100 (aka 5200 Jr.) prototype from 1984

45 Atari Mirai ??? what is it???
46 Atari Pong from 1974
47 Atari Video Pinball 1977
48 Atari 1055 3.5" Drive prototype from 198X

Eric Bacher from France sold 40 numbered copies of his new game Alfred Challenge at the WOA. Great game (though I haven't found the secret level yet) and he even signed my copy - pretty cool guy.
There are 50 numbered copies of Alfred Challenge, 001 - 009 were for Eric and friends, 010 - 049 where sold at the WOA.

A rare Video Jogger, mint in shrink-wrap! It went in the auction for $85 - that's a very very good price!

Atari 8-Bit Expansion Box, and the ST-based Pen Computer, in the upper left there is a Atari 8-Bit-based Videodisc information system.

The ST Notebook Computer and the groovy Atari Video Music machine (stay mellow man!).

Original Cookie Monster artwork, 'printed in USA' Donkey Kong labels and other stuff from the auction.

Rare stuff from the auction.

Boards for the 8-Bit Dual Floppy Drives at the auction.

Mystique adult Atari 2600 games and a box full of Atari 5200 cartridges at the auction.

Scott, Eric Kaljumagi and Stehpanie in front of the Battlesphere setup.

Dan Kramer's special version of Centipede on the Atari 2600.