Wordpress exposes a so called Pingback API to link to other blogposts. Using this feature you can scan other hosts on the intra- or internet via this server. You can also use this feature for some kind of distributed port scanning: You can scan a single host using multiple Wordpress Blogs exposing this API.
Quick-scan a target via a blog:
ruby wppps.rb -t http://www.target.com http://www.myblog.com/
Use multiple blogs to scan a single target:
ruby wppps.rb -t http://www.target.com http://www.myblog1.com/ http://www.myblog2.com/ http://www.myblog3.com/
Scan a free wordpress.com blog (all ports) from the internal network:
ruby wppps.rb -a -t http://localhost http://myblog.wordpress.com/