Subdomained URL

Before each group name is something like
http://groups.wuyasea.com/group/xyz
now group name is subdomain based:
http://xyz.groups.wuyasea.com

Pretty URL

Before, article's url is something like
/blog/5/articles/11
To make the URL more user friendly, new URL added title:
/articles/added-tagging-support/11

Now combining both changes, typical full article URL example is like
http://making.groups.wuyasea.com/articles/added-tagging-support/11