My wish list:
Two years ago I asked for Cassandra use cases and feature requests.
 The results  have been extremely useful in setting and
prioritizing goals for Cassandra development. But with the release of
1.0 we've accomplished basically everything from our original wish
I'd love to hear from modern Cassandra users again, especially if
you're usually a quiet lurker. What does Cassandra do well? What are
your pain points? What's your feature wish list?
As before, if you're in stealth mode or don't want to say anything in
public, feel free to reply to me privately and I will keep it off the
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support