After having a bit of difficulty including Protovis code on my blog
(as discussed here:
http://www.stubbornmule.net/2010/09/protovis-on-wordpress/),
I ended up throwing together a fairly basic plugin to make it easy to
include Protovis.
It bundles up a copy of the protovis library, includes a reference to
it in the header page (at the moment it loads it for every page!) and
creates a shortcode to provide pointers to your protovis file.
I hope this may be handy for some people. Please let me know if you
have any suggestions/fixes/etc.
Sean.