Choosing an embedded linux with driver support

From: DD (nowhere_at_noemail.org)
Date: 04/16/04 

Date: Fri, 16 Apr 2004 06:30:55 GMT

I am new to the embedded linux world, and would like to choose the right OS
for an industrial control machine. We will be using PC-104 boards. An
important factor is support for a wide variety of drivers for standard
peripherals.

Which top 3 are considered the best general purpose embedded linux
(commercial or free) with the best toolsets and driver support?

Thanks..