Is everyone's software phoning home these days? Here's another one.
Adobe Acrobat Reader version 7 recently became available for machines running GNU/Linux. The link above will take you to a page detailing that the software phones home and what information it transmits. This is the first instance of such behavior in Linux, that I am aware of. I'm sure that is mostly due to the fact that users of the OS tend to stick with open-source or free software, rather than proprietary applications such as the Acrobat Reader.
There are many alternatives to Acrobat Reader in Linux and other non-Windows operating systems. Seeing as I don't want to inform anyone of what I'm doing on my machines, I'll be sticking with the one I am using now and not installing the Adobe app.