Re: What actual benefit do I get?
I have a project named PHP Object Oriented Framework (http://www.sourceforge.net/projects/poof/).
POOF uses PHP itself as its template engine. Nested templates are also easily supported. Using PHP as the template language means there is very little script overhead and no compilation is necessary. POOF is still in alpha stage however.
However the template syntax might be harder to use for template designers.
What do you all think about having PHP as the template language?