Ah, I see. So, adding ‘play’ in front of a link basically inserts the ‘playthispage’ class through the bookmarklet / firefox plugin. Cool.
Goose is awesome, by the way. It’s one of my favorite web browsing tools – use it every day. If it could fast forward and scrobble to Last.fm, it would be near perfect. I always thought a video version would be cool too. Same concept, but the player would show a playlist of flash videos associated with a page or link.