[colelyman]

Have you seen http://www.hakank.org/ ? Mostly about constraint programming, but definitely in the realm of operations research.

[nickpeterson]

I've stumbled across it a few times way back when I was looking at MRP stuff for an ERP I worked on. I remember it being a rare gem of a website. I'd throw away 99% of web pages if the ones remaining were all like this one. Thanks for the reminder!