Sorry for the POV problems.  I was working slowly, basically alone on (I thought) a forgotten article, but suddenly it's COTW.  This moves a lot faster than I'm used to.  I intended this just as just a general introduction, to be supported and referenced later in the article.  It would have taken weeks to months for me to finish this, a bit at a time.  Others have taken this and gone beyond that now, which is a good thing.  Feel free.   13:06, 12 Mar 2005 (UTC)