According to this new post on his blog Stefan Priebsch, Sebastian Bergmann and Arne Blankerts have joined forces to create thePHP.cc, a PHP consulting group.

In times of tight budgets, quality is a key success factor to reduce risks in IT projects. [...] We help businesses and enterprises to reduce IT costs in the long term with Open Source technologies and PHP in particular. We support our clients in improving their employee's qualification to overcome skills shortages.

You can get more information about the group (including conferences they'll be at and contact information) from their site - thePHP.cc.