RDFa profile and new URI

I just added a short profile about myself embedding RDFa that aims to replace my old FOAF file, in which I already moved some things (i.e. relationships) to external services.

I also gave me a nicer URI, http://apassant.net/alex that uses content-negociation to redirect either to the HTML version of this profile or to the extracted RDF one, depending on the Accept header, combining some rewrite rules that Ivan Herman defined for the SW Faq and the .htaccess used for the Flickr wrapper. My old foaf.rdf file is also now redirected to this extracted profile, and I'm using an owl:sameAs in RDFa link to be compliant with services that uses my old URI.

# Old foaf.rdf compliance
RedirectPermanent /foaf.rdf http://www.w3.org/2007/08/pyRdfa/extract?uri=http://apassant.net/about/
# RDF redirect for my URI
RewriteCond %{HTTP_ACCEPT} application/rdf\+xml
RewriteRule ^alex$ http://www.w3.org/2007/08/pyRdfa/extract?uri=http://apassant.net/about/ [R=303,L]
# HTML redirect for my URI
RewriteRule ^alex$ about [R=303,L]

I'm also wondering, since this profile is used as http://apassant.net homepage which is also my OpenID URL, how it will work when loggin on websites using SparqlPress + OpenID as ARC2 embeds an RDFa extractor so that it should discover my FOAF data without using any autodiscovery link.