We maintain a public directory of Apostrophe developers:
http://apostrophecms.org/support/directory.html
Please do join. All you have to do is submit a pull request on the documentation repository. See the bottom of the directory page for details.
We welcome submissions from all active Apostrophe developers interested in potentially pursuing work with new clients.
For us, one of the major benefits of the directory is that it helps send the message that Apostrophe is much, much bigger than P’unk Avenue. That’s important to our clients, who want to know that they are not locked in to working with us.
And, of course, it’s simply good for Apostrophe’s growth as an open source CMS.
Thanks!