Excellent! Glad this has been sorted out upstream.
Edward, to answer your question regarding blocking database calls: I'm using mongoDB to log events that come into a WAI webapp. The writes to mongo are blocking, so I'd like to run them in parallel with the webapp. The webapp would push the data into a Chan and the mongo writer would read from the Chan and make the writes sequentially (using the Chan as a FIFO between parallel threads). This would allow for request rates to temporarily rise above mongo's write rate (of course with an expanded memory footprint during those bursts).