I have been following the roundcube webmail project since version 0.1. Back then it was quite cumbersome to install on a Linux host. With 0.3 installation has turned into a cakewalk so I decided to try it now.
I only needed to update my PHP4 to PHP5, unpacked the installation package to the web root for the virtual host I created for roundcube, created a new mysql database and started the installation procedure.
Though it is still only a 0.3 version it has quite some impressive set of features. Of course due to its Web 2.0 nature it is a little bit slower than squirrel mail that I used earlier!