It looks to of stagnated since the announcement was made.
Architecture wise Pulsar is a far better piece of engineering than Kafka but with Confluent's funding and aggressive marketing it looks like Kafka has cornered the market for better or worse.
StreamNative is the company behind the linked blog post and project.
My (outsider) understanding is that both Streamlio and Splunk employ(ed) active members of the Pulsar community.
Also, Kafka has:
* Kafka Connect
* Kafka Streams
Does Pulsar has something comparable?