At work I've been working on a Unity demo to demonstrate various animation techniques, and I ended up making it into an actual game (albeit a small one). You can read more about it - and play it! - here:
New Character Animation / 3rd Person Shooter Demo
It's based on a tech demo that Paulius Liekis and I did for a presentation at Unite '09. You can see a video of the presentation here:
Character Animation Tips & Tricks