Ha, found (via the wayback machine) the original article[1] and also an HN discussion about it back then too[2]. Fenn didn't mention who it was for, "just some friends" - I guess I figured out the connection and linked it to Adioso in my memory.

[1] https://web.archive.org/web/20111014232647/http://fennb.com/... [2] https://news.ycombinator.com/item?id=3109283