Here are some reviews from Softpedia on OS4
Linuxed - Exploring Linux distros also did a review of OS4 OpenDesktopComputerWorld Interview
Here is what some are saying about Black Lab Linux
" So far it all just seems to work. Videos on Maxkeiser.com which are purple skinned in Xubuntu and Mint KDE have the correct flesh tones. Pulse audio works with my Logitech camera/mic, even Skype works after some tweeking.
I my opinion Black Lab Linux is better than Mint 12 xfce, hands down! It is the fully functional replacement for Gnome 2.3 that I have spent months looking for."