We've discussed content tagging for surveyors before. Pretty soon, I will be implementing a full scale tag based search engine to Land Surveyors United-further emphasizing the need for all content on the network to have correct and accurate tags associated with each item.  Here is a preview of this Tag Cloud as I have it currently developed:

And here are a few other examples that I've played around with:

Speaking of Tagging, have any of you seen Microsoft Tag yet?  Here is the tagging system that I am creating using QR Codes for Surveying.

Have any ideas to add to this project?  Drop them below...I would love to have this become a network-wide collaboration.