Here is one I am really impressed with; I can't say just how much of it is Pharo:

https://medium.com/concerning-pharo/pharo-beta-nine-59ee972d321a

On Tue, Dec 13, 2016 at 12:00 PM, <pharo-users-request@lists.pharo.org> wrote:
------------------

Message: 1
Date: Mon, 12 Dec 2016 19:16:26 +0100
From: Volkert <volkert@nivoba.de>
To: Any question about pharo is welcome <pharo-users@lists.pharo.org>
Subject: [Pharo-users] real world pharo web application set ups
Message-ID: <7b7e6144-724f-1eb7-8033-8cfe87a34ef6@nivoba.de>
Content-Type: text/plain; charset=utf-8; format=flowed

After reading reading "Enterprise Pharo a Web perspective", i am curious
to learn more about current real world pharo web application set ups.
any case studies or blue prints around? i am interested in application
domain, system architecture, infrastructure (HW/OS/DB),�� performance
goals (concurrent users, transactions, ...), system sizing, scalability
strategies, ....

everything which could important to convince "me" to select pharo as a
platform for a saas solution ...

Thanks,
Volkert