I've been using this , You can put flattened-out cardboard from a sixpack or case of beer between the mount and the wall to prevent tiremarks and also for bonus hipster points.

Same company, looks like you got the michaelangelo and I got the leonardo. There's this but no raph.

My poor spatial skills and no engineering abilities is your gain!

I'm selling 2 Delta single bike wall mount rack with tray. $30 for the pair. Holds up to 40 lbs and tire widths up to 2.5". Solid equipment. I bought these on Amazon this spring and it didn't work out in my space and then I forgot to return them on time. I've opened 1 of them to install it and figured out my mistakes.

Here's the Amazon original link- https://www.amazon.com/dp/B000FGTTEW/ref=cm_sw_r_cp_api_fab_NDECFbBS52NHK

It's not freestanding, but I use this wall mount in my apartment and it works quite well. No handy skills required--just find a stud and screw it in.

I use this :

http://www.amazon.com/Delta-Leonardo-Single-Bicycle-Vinci/dp/B000FGTTEW/ref=sr_1_2?ie=UTF8&qid=1308579420&sr=8-2

Simple design, works well. Hook does not scratch my wheels.

Not very unique, but it works.