Arcade Controls - It all starts here!  You will find a tremendous wealth of information on this site.  The forums are the best, in my opinion.  Hundreds upon hundreds of great examples.

Ultimarc - Home of the I-Pac and the new Mini-pac! I use Ultimarc's products in all my controllers.

Emdkay.net - Can print standard and custom marquees. I have used his services a number of times with great results. Give him a try.

Lowes - I have lost count of the money I've spent at my two local stores.

Routerbits.com - They have great bits and fast delivery.

Retroblast - Kevin regularly reviews arcade-related products and includes industry news. He is a pleasure to communicate with.

X-Gaming- The home of the X-arcade.  This control panel was the start of my arcade addiction.

CabinetParts- Sells Wilsonart laminate at reasonable prices.  Very fast delivery.

- MAME and MAME32 frontend.  Very cool 3D interface created by a fellow enthusiast.

scottmccullar.com- My comic book writer/artist brother-in-law's home page.  Look for his work at a newsstand near you. 

Mike Trello's Blog- My technology Blog.