I've found the link to a superb website through one of my favorite blogs, Copenhagenize.com, there. It describes an easy to use, safe and automatic bicycle parking system. And the best - it is in Europe, more precisely in Spain. Congratulations to you there! See the Biceberg website for more information. As far as I could see it is meant for short-term parking, less than 24 hours. Unfortunately I couldn't find out how much it costs. If one of you has more information on that please post it here.
Btw, I quite like the name of the thing cause it contains 'bicycle' and 'iceberg'. And like at a real iceberg you can also only see the little top and most of it is under the ground (resp. under water). Maybe you want to see a promotion video (in Spanish) to understand how it works.
In Austria we don't have something like that yet, but I have hope now. The most modern thing in Vienna so far is a bicycle garage in Margarethen for only 20 bicycles, but that is meant for long-term parking. It costs 13€ per month which I think is quite cheap. There are a few extra costs in the beginning like deposit for the key and such. I didn't have a look myself cause it's far away from my flat, but if you're interested you can find more information there (in German).