If you’re not already using IT-Ebooks.info for sourcing ebooks, then you probably should be.
I recently upgraded the Mongo PECL extension that a project depended upon, only to get hit with a load of Segfaults on OSX. I had used the pecl upgrade mongo...
Using Facebook to authenticate users for you application is nice for a number of reasons.
I recently wrote a Ruby gem called Perfecta, that wraps the Perfect Audience reporting API.
This is something I can never remember, and keep having to Google.