upgrading installed ports: time to do it ?

[danny]

Hi list members ,

I frequently update the contents of the ports tree but I have never upgraded 
any port. I am studying the way to do it, by following the handbook and an 
article on The FreeBSD Diary about the use of portupgrade.
At the moment I am focuing the attention to the '/usr/ports/UPDATING' file. 
The question that arose is the following: is there any automated way to check 
if any of the port to be upgraded has specific upgrading notes written in 
that file ? 
Do you prefer doing a mass or selective upgrade ? 

Thanks !

dan