I’m still enamored with this wall-sticker company who’s creations look just like doodles I would love to re-create on my own living-room-canvass… Though, not all as elegant-looking as Mira’s, but apparently there’s more stuff like it out there in the wild wide world.
Here are some from the French site Acte Deco:

And there’s Blik, who, among others engage wonderful Threadless talent:

In addition to “regular”, wall stickers, they (Blik) also have some really cool kiddie-room graphics, “autographics” and even re-movable(!) t-shirt decals!

And for the unadventurous scaredy-cats, the very least you can do, is doodle digitally onto a photo of your empty wall, just like this girl did:

By the way, cool “Urban Scrawl” doodle-brushes she was using, from InvisibleSnow.