Is Volo Airsport still in development? It looks interesting, and I almost bought the Early Access version on Steam already, but then noticed there haven't been any updates on Steam or your blog for over ten weeks, and having been burned by abandoned projects in the past, this seems sadly familiar.

Still in development, and v3.5 is nearly out! You can play test version of it right now on steam, and read changelog and reactions here:
We're on the job, we've just been so busy we neglected to post development news on the blog. :)