I think something is on the way (based on a conversation on IRC). I think a new release is undergoing the last stages of testing but can't be released yet because it's based based on a pre-release SFOS, and nobody is allowed to distribute it yet. That was about a week ago though so it might be available now.

Either way, it's going to be a re-flash job rather than upgrade.

Everyone on IRC is very friendly, might be worth asking on there yourself?