I've made it through all the ogre tutorials, so I think i'm about ready to start a project using it. Will probably look into physics code - going to check out ODE and Newton. I'm leaning towards ODE, because while they're both free, Newton doesn't have it's source available - and it would be rather unpleasant if the developers stopped maintaining it (which is far too common in free software).
I've also been playing the Darwinia demo - given that it's from an indie development team it's a great game - though it could really use a bit more of a tutorial level. I spent far too long being stuck because I knew what I needed to do, but couldn't figure out how to do it (for example - getting the Darwinians off an island so I could lead them back to the protected zone). Oh well, at least it's an interesting game.