RDFa Primer ready for Working Group review

Hi all,

As promised, here is the RDFa Primer, ready for Working Group review, as 
per our Task Force vote last Thursday.

http://www.w3.org/2006/07/SWD/RDFa/primer/20080422/

This is a *significant* rewrite of the Primer. It is shorter and 
contains less RDF. At the same time, we believe it is significantly 
easier to read for HTML authors, our main target, without compromising 
on the benefits of RDF.

Unfortunately, as I am in Beijing, I won't be able to attend the call, 
but I, like the rest of the task force, look forward to your comments!

-Ben