A few days ago, I had tweeted
about a first version available via its
GitHub repo. The package is now on
CRAN which will make it easier to install for many.
You still need an API key (free, after registration at Pushbullet)
and one or more target devices to message to: an modern smartphone (Android, iPhone, …) or a Chrome browser
provided you also installed the corresponding app.
I also set up a
short web page
on my server with some more information and an example. So pushbullet away…