From “Semantic Wave 2008 – Free Summary Report for RWW Readers“:

Project10X has just released a 400-page study of semantic technologies and their market impact, entitled Semantic Wave 2008: Industry Roadmap to Web 3.0 and Multibillion Dollar Market Opportunities. A free 27-page summary of Project10X’s Semantic Wave 2008 Report has been made available to ReadWriteWeb readers.

I just filled up the form to get my copy of the summary. It says I’ll get an email with a link within four business hours.