The two I'd most highly recommend you start with are Eric Bobrow's considerably large library of both tutorials and templates and the like, and you should also look up Shoegnome (Jared), who's a regular on these forums.
Others that are little more commercial would be like BIM6x and Central Innovation (formerly CADImage), but they are more resource-based, and the latter are more regional (New Zealand/Australia based), but still have some useful stuff that someone setting up their own workflow might find useful.
There's obviously a whole bunch more, but these are the ones that come to mind for me for someone that might be looking to set up a new system and customize it to their needs, and as always the internet itself is usually a pretty good resource in and of itself.
