I think this is the first post I've seen about Samza from a non-LinkedIn team. I'd love to hear any details about the Samza experience - it seems like it should be the logical choice for Kafka users, but there's not much out there about it.
I don't think Confluent really counts as "non-LinkedIn team" :)
"Jay is co-founder and CEO at Confluent. Prior to Confluent, Jay Kreps was the initial developer on several open source projects, including Apache Kafka, Apache Samza, Voldemort. He was the lead architect for data infrastructure at LinkedIn."