How do I export SketchUp models into Unity?

[Kagame]

Yes, I know Bac9 had a blog entry on this very subject. Thing is, with the forum upgrade, that is now lost to history. So, once more for old time's sake:

How do I import this decent set of parts I made into Unity?

[Mecripp]

I seen one guy import them into Blender and then export it to *.dae or *.fbx then import them to Unity

[Kerbal01]

Sketchup can export files to .dae, then you could import them to unity.