That thread is amazing. My favorite part is the inventors of Tarsnap and Dropbox basically saying to each other, "oh hey, I'm working on the same thing as you!"
That's a bit of a mischaracterization. Drew said that he was working on the same thing as me; I didn't respond, because my response would have been "no, you're not; I'm building a secure backup tool" and I didn't want to antagonize people any further.