I just found Russ Beattie's blog post where he talks about shutting down his company Mowser.
The post is a really mature analysis of his situation and reminds of when I left the first company that I started. I'm not an expert on his space, or on his company but I have been in his shoes before staring into the abyss.
Russ - best of luck in the future. I hope you'll find that the experience has made you strong and that you do try again someday.