Development is still going, I can't give you an end date for when it'll happen because getting the actual Pico hardware manufacturing underway is my priority right now.
It's looking a bit more difficult to support multiple USB devices at once in the F103 (original Espruino) board due to lack of USB endpoints, so it probably won't have the support initially until things die down a bit and I get more time.
In terms of MIDI, the way I'm implementing the USB HID should allow the device to enumerate as many different types of HID device. I'll be providing example JavaScript libraries for basic stuff like keyboards and mice, but for MIDI you may have to do some reading and copy/paste to get it working - although hopefully others will contribute libraries that pretend to be other types of device.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Development is still going, I can't give you an end date for when it'll happen because getting the actual Pico hardware manufacturing underway is my priority right now.
It's looking a bit more difficult to support multiple USB devices at once in the F103 (original Espruino) board due to lack of USB endpoints, so it probably won't have the support initially until things die down a bit and I get more time.
In terms of MIDI, the way I'm implementing the USB HID should allow the device to enumerate as many different types of HID device. I'll be providing example JavaScript libraries for basic stuff like keyboards and mice, but for MIDI you may have to do some reading and copy/paste to get it working - although hopefully others will contribute libraries that pretend to be other types of device.