Thanks for sharing this! Now that we're on the topic of useful
resources, I like the concept of
http://rhinospike.com , although it
depends on how popular your target language is.
Also, for those of us that don't follow Google+, the development
version now has a new card type Sentence, which is essentially a cross
between Cloze and Vocabulary, and where you can do
Nicht für [die] [Schule:school], s[ondern] für [den] [Spaß:fun]
[lernen:to study] wir.
Peter