Microsoft Commerce Server developers" , now that's a rather small group J
This first thing you notice as a developer or administrator is that good commerce server resources are hard to find.
I've compiled a list of good resources for you to use.
The official e-commerce blog – the official Microsoft's Commerce 2009 blog
MSDN – if you're developing commerce applications , you should probably have this one in your favorites
Forum – if you'll have any questions regarding commerce server (and you will), this is the place for good and rather quick answers
Commerce Command line tools – some useful tools that were originally in the 2007 version.
Pipeline Component Reference – MSDN's reference for creating a pipeline component.
Feel free to expand the list.