BaoFeng Tech, the Baofeng radio distributor in the US, has released the APRS-K2 Cable.
With this cable, you can connect your Kenwood 2-pin compatible handheld radio to your mobile phone and utilize APRS through an app. Furthermore, you can also use the cable to record audio from/to the radio or even connect the radio to an external speaker.
You can get the cable here.
It certainly looks promising, I’m thinking of getting one.