Hey there @pocock
For track submission for the Live Stream, all details here + there's now a new dedicated page on the website from which you can directly upload Mp3 audio files, you'll find this here.
PS : It's too late for tonight show right now, since it will start in a few minutes
There's also a Track Feedback section here on the forums, just create a new topic in this section : https://forums.sonicacademy.com/c/track-feedback by using the + New Topic button on the top page. Make sure to include a link to your track, a SoundCloud or YT link for example.