I discovered hCard in about May 2009. So far I prefer the Operator extension for Firefox for accessing microformat content. Oomph is slick but I have a slow computer; perhaps on faster boxes it is the cat's meow. I've noticed that "fn org url" construction does not yield a hyperlink URI in .vCards served back from the parsers I've tried. That was one of my frustrations in building my first hCard. I couldn't find documentation about this.