Unfortunately, the CD type of suggestion was typical of what they got from
government agencies.


They talked a lot about the stone carving thing, but were worried that
someone might steal or deface the stones.   Other interesting ideas like
"broken ground".   It's a good read.

http://www.amazon.com/Deep-Time-Humanity-Communicates-Millennia/dp/0380793466/sr=8-1/qid=1157124358/ref=pd_bbs_1/104-8486181-6348768?ie=UTF8&s=books
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