David O'Toole put out version 1.0 of his roguelike puzzle game XONG yesterday.
When he asked me to try it out, I expected some headache when downloading it, compiling it, grabbing libraries, etc. Nope! I'm using Snow Leopard on an Intel MacBook. I grabbed the .dmg, double-clicked the xong icon, and it ran perfectly. It bundles an executable SBCL image together with the graphics, sounds, and libraries it needs, so it's completely self-contained and looks like any other Mac .app bundle. It's nice to see this kind of application delivery.