Tonight it has been wiki time. The article on IMP from the English wikipedia was a mere stub and I expanded it with a little bit of history. I will hopefully find the time to continue this later. I recently did the same for the Horde article.
In addition I updated the list of Horde deployments in our Horde wiki. I also added a list of Horde hosting providers and a list of alternate installation methods for Horde. I couldn't refrain from adding a short abstract on why we only offer PEAR with Horde 4 to the latter article.
Of course corrections and additions are very welcome!