+1 for Spiceworks
Trevor, another fantastic article.
Almost from the beginning I was wondering, "has he heard of Spiceworks? If it doesn't come up in this article I'll make a note in the comments about it".
I started using Spiceworks about 9 months ago when I started working for a new company and wanted to put some management and system monitoring in place. I found it through Google and figured it was worth my time to check it out since if it delivered on its promises I would have everything I was looking for for free. I've never looked at anything else after that and have ever since been singing it's praises to friends in the industry.
The client is Windows only which could be a problem for some people, hopefully they will do something about that one day. Also, since it relies on WMI for Windows boxes, you have to remember to configure the Windows firewall to allow the traffic through and I've seen a couple of cases where WMI was messed up on a machine and needed fixing (though this is a Windows problem not a Spiceworks problem).
The best part though is the community which are incredibly knowledgable and very helpful.
I'll look forward to your article about it and I'm sure those in the Spiceworks community will be happy to see it get a little more recognition.