Question : How To Set Up an Internal Blog?

I would like to set up an internal blog for our company. Does this have to be developed internally? Or is there software available? Or do the general blog software companies offer privacy set-ups so that only members of the group can read what is posted?

Answer : How To Set Up an Internal Blog?

no you don't have to develop this by yourself
check this blog system

http://www.movabletype.org/

you can download a personal version and install it by youself to see if it fits your need