PostBooks 4.9.5 was recently released and the packages for Debian (including jessie-backports), Ubuntu and Fedora have been updated.
pgDay.ch is coming on Friday, 24 June. It is at the HSR Hochschule für Technik Rapperswil, at the eastern end of Lake Zurich.
I'll be making a presentation about Postbooks in the business track at 11:00.
If you are not currently using a double-entry accounting system or if you are looking to move to a system that is based on completely free, open source software, please see my comparison of free, open source accounting software.
Free and open source solutions offer significant advantages: flexibility, businesses can choose any programmer to modify the code, and use of SQL back-ends, multi-user support and multi-currency support are standard. These are all things that proprietary vendors charge extra money for.
Accounting software is the lowest common denominator in the world of business software, people keen on the success of free and open source software may find that encouraging businesses to use one of these solutions is a great way to lay a foundation where other free software solutions can thrive.
xTuple, the team behind Postbooks, has been busy developing a new Web and Mobile front-end for their ERP, CRM and accounting suite, powered by the same PostgreSQL backend as the Linux desktop client.
More help is needed to create official packages of the JavaScript dependencies before the Web and Mobile solution itself can be packaged.