What you have is a very common issue, the valve cover gasket is leaking. In fact your timing amazing, because I'm replacing my valve cover this weekend because mine is also leaking in the exact same area. My theory behind the leak is that this area is where the PCV system channels fumes up from the crank case, and the fumes are a little hotter and finer than in other areas.
I have run mine like this for about a year, same as with you the oil leaking out is very minimal so the repair can wait. That said, someday the valve cover will need to be replaced. The new valve covers all come with new gaskets and it doesn't take very long to change.