Everything is in beta testing right now, but you should be able to generate useful, ready to use designs from the small but growing library.
Think of it as a mashup tool for electronics. Now the next time inspiration strikes, there's that much less between you and the hardware you need to make it a reality.
It's not a tool for completely original design.
However, it can recreate things that others have done before and arrange them in original ways. Most electronics projects pull from some fairly standard base circuits (how many boards have you seen without a power source?). So even if your project requires something that hasn't been done before, we aim to build a library that lets you get the tedious bits out of the way first.