I beta tested phpfog a while back and was less than impressed. It had a few security problems such as not knowing about open_basedir restrictions and permissions. You could enter other directories and delete other websites.
I didn't have much faith with the person running the operation. Hopefully they can update me with their situation.
I learnt a few things from the Kohana source. How not to use regular expressions for validating certain strings (URLs) for one. filter_var can do this and a lot faster too.
I suggest anyone who's interested in PHP to take a look.
I guess I need to create a new account?