Hi boogieman,
We converted the most popular pages and actions into a mobile version of the site, including forums and community pages, quick adds for trackers, and access to their friends' feed. The idea was that for our mobile users doing something quick while on-the-go, we wanted to allow them access to these areas on the site using a page that loads more quickly than our full site. Some pages, such as accepting a friendship invitation, have not been converted to a mobile page.