Bl8ckr0uter and I were having a conversation on AD, and he asked me an easy way to get some info on AD. I remembered at one time I had used a tool from Microsoft to map out the domain - Microsoft AD Topology Diagrammer. You have to have Visio installed to use it, but the tool will pretty much lay out your AD/OU infrastructure for you, and then **** it in to Visio. If you have Exchange you can have it put that in as well (we don't run Exchange in the lab so I haven't used that feature).
Info:
Here
Download:
Here
Just thought I'd share this with everyone as it might be beneficial to others!