I have the mobo. Which OS?

From: "kitepilot@kitepilot.com" 
Hello all: 

Well, somehow I got a link to this puppy:

It has everything I need! 

My plan is to add a wireless radio to the miniPCI bus and deploy these 
babies as AP and bridges in my network.  I don't need any security and/or 
fancy configuration other than to optimize the wireless link, because all 
security is done at the firewall level. 

Question is:
Which OS? 

I am leaning towards a flat Debian, but I am entertaining building me a 
Open-WRT image for it.
Any insights?
Which one or which not?