Puck's Playground
Jeff Bennett's Page O'Adoration(The first Owenite Goddess) Tara O'Shea's page has all her Owen-related fanfic, her fanart featuring Owen and Rowan (her character), and a small image gallery.
Gargirl's "fan description" of The Mirror includes pictures, audio and video files from the episode.
Rhowell (Owenite Queen and generally strange person) has by far the largest collection of Owen and Puck fanfic.
Puck's Fellowship has all kinds of lovely things, but I don't have time to list them right now.
Home of the Puckateers. It has the Puckateers' bios, some original pictures of Puck, some poetry, an article, a short fiction, and probably other things that I've forgotten.
All kinds of information about Jeff Bennett.
A new Puck page, featuring Puck's photo album.
Her page isn't directly related to Owen/Puck, but she does have some fanfics (and a poem) with him in them. Besides, she's an Owenite Goddess, so go visit her.