There's three deleted scenes: One from "What Kate Did", I think, featuring Sun and Jin in the Hatch talking while Sun takes care of Sawyer. It's probably the best of the three. Then there's one from "Man of Science, Man of Faith", featuring Jack and Charlie talking about Kate's decision to follow Locke into the Hatch. Last is one from "The 23rd Psalm", featuring Eko and Locke having a brief discussion about the saw Eko wants to borrow.
There's also two behind the scenes things: One about Madison, the dog who plays Vincent. It's pretty fun. The other is about the fans and how they analyze all the details of the show. It's kind of dumb.
Then there's the trailers for the Season 2 DVD and Season 3. There's no spoilers, except for one that most people have probably guessed by now, which is that [spoiler]Locke, Eko, and Desmond all survived whatever it was that happened in the Hatch.[/spoiler] There's one hidden secret: [spoiler]If you go to the main menu and click the middle of the O in LOST, you can see a little clip of Evangeline Lilly playing with the baby who plays Aaron. It's cute.[/spoiler]
Scharr, scharr, verscharr das Gebein, grab es tief unten im Keller ein.
Später dann graben es andere aus, und nennen dein Haus das Knochenhaus.
Scharr, scharr, verscharr das Gebein, leg auch ihre weißen Schädel hinein.
Mit Beton gießt du es aus, das Fundament vom Knochenhaus.
Scharr, scharr, verscharr das Gebein, da ist noch Platz, da paßt noch wer rein.
Hier tobte sich der Teufel aus, unten im Keller im Knochenhaus.