I felt like something new. And I had an empty wall. So 1+1=2.
This is probably the cheapest way to cheer up your wall. Just have to get some wood sawn in the sizes you like, and buy some clamps (these are from Dille&Kamille). Now you have a very flexible system, you can change the things you hang up in a second. I'm already dreaming of a wall full of old botanical prints. Or a little exposition of my poems.
Now I just need to sand the wood. But since it's already hanging...oh well ;-) who cares?