LVina I checked nightly builds and they don't include U-Boot binary unfortunately. I'll check how to change that.
ldecarli No. Headers are not pin compatible and I2S on PC2 is not actually exported. You would need to unsolder one LED and use it for I2S DOUT signal and change DT file to remove LED definition and add new I2S node. So it can be done but nothing I would recommend nor I would help with that procedure.
gabe I didn't add TV out support yet.
Lewis It remains to be seen how much boards will be released as stable. I certainly don't have all of them, so it would be nice if people would report status once beta1 is released. Certainly H2+ and probably R40 boards won't be.