[DISCUSS] KIP-739: Block Less on KafkaProducer#send

[Nakamura]

Hey Folks,
I just posted a new proposal
<https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=181306446>
in the wiki.  I think we have an opportunity to improve the
KafkaProducer#send user experience.  It would certainly make our lives
easier.  Please take a look!  There are two subproblems that I could use
guidance on, so I would appreciate feedback on both of them.
Best,
Moses