<<<THE MONITOR>>>
The monitor is one of the most important aspects of a MAME cabinet.  You must choose wisely my son 

.  I am using a 27" NEC 4PG multisync display monitor.  Hooks up just like a PC monitor with a 15 pin VGA cable.  Also has s-vid and component for consoles.  It works FLAWLESSLY for gaming AND Windows XP.  It works great at 1024x768, that's what I use for my "real" computer's desktop res as well!!  I am typing this from the arcade cab now, so you see, I can read the screen VERY well.  You can see the specs here:
http://www.griffintechnology.com/archive/monitors/NEC13.htmlIt was $75 on ebay!  What a steal!!!  I picked it up to so no ridiculous shipping charge!
<<<THE COMPUTER>>>
I bought the computer that is in the cab back in November 2001.  I "recently" (November 2002) bought a newer one, and so this became my gaming computer, destined for the MAME cab.  The Specs:
Intel Pentium 4  1.6GHz with 400MHz FS Bus, 256KB Second L. Cache.
80 Gig hd, 256MB RAM, 64MB DDR 4x AGP nVidia Geforce 3 Ti200, 4 USB, Network card, 3 firewire, Sony  CD-RW, 16X DVD, floppy, 6 channel Dolby Digital Audio Controller for 5.1 audio, modem, keyboard with hotkeys (volume comes in very handy right now), and scroll mouse, running Win Xp home.  
I bought it at a food store (of all places) called ALDI's.  It is a MEDION computer.  If you ever see one of these deals, I suggest you buy it immediately.  I bought it for $699 total.  It was a steal at the time (2001)
<<<Software>>>
Emulaxian FE:          
http://3darcade.mameworld.net/index2.htmMAME32 with all the trimmings:                            
http://www.classicgaming.com/mame32qa/down.htmVisual Pinball           
http://www.randydavis.com/vp/ and vpinmame        
http://www.pinmame.com/Arcade Jukebox 7:  
http://home.att.net/~mark.schwartz/NES, Super NES, N64, Sega emulators...
Many PC games...I suggest these for arcade/cab quality: 
Star Monkey: 
http://www.smallrockets.com/pc/starmonkey/Mutant Storm: 
http://www.pompom.org.ukMarble Blast: 
http://www.garagegames.com/pg/product/view.php?id=15LaserAge: 
http://www.pcgameworld.com/details.php/id/83/DX-Ball 2: 
http://www.longbowdigitalarts.com/dxball2.htmlMicrosoft Pinball Arcade: 
http://www.microsoft.com/games/pinball/Bejeweled: 
http://www.popcap.com/bejeweled.phpTetris 4000: 
http://www.alawar.com/games/tetris4000/<<<PUTTING IT TO THE TEST>>>
I now was staring at a fully functional gaming cabinet, what to do...what to do...um GAMES!!!!!  I booted up Peter's extremely excellent Front End, EMULAXIAN!  The first game I tried on the cab was Pacman (to test the e-stik and vertical games), the 27" screen displays VERTICAL games GREAT!  It looks very much like a 19" vertical monitor because of the large screen size!  I then tested out the vector game TEMPEST for my spinner test/vector test.  PERFECT!  Then, it was marvel vs. capcom for some button smashing/joystick testing...I was amazed.  The super with cherry switches is better than the x-gaming stik with x-gaming switches by the way.  I did a side by side comparison.  Then, to test out some PC gaming goodness, I played some starcraft, red faction, dx-ball 2, rollcage, Labyrinth, and Star Monkey.  I then had to test out PINBALL games...of course, I tried VISUAL PINBALL, then Microsoft pinball arcade, and also 3D Ultra Pinball Thrillride.  Catch the silver ball addiction!  Eventually though, I went back to MAME for some time pilot, time pilot 84, qix, quantum, Mr. Do!, Donkey Kong, marble madness, asteroids, and I couldn't forget Arkanoid for my dedicated Arkanoid spinner!
<<<Future Enhancements>>>
-install light blue t-molding
-Mount the speakers, get a strong base speaker
-lengthen lightgun wire
-light coin mech slots
-wire up coins mechs to except coins and activate coin "buttons"
-add volume dial
-add headphone jack
-KEEP ON PLAY'N!
Questions/comments/suggestions?  Thanks for reading this mess!
~Mrbond