So you want to just create a simple blog? That wouldn't be too hard, you'd just need to set up a table in the DB with the information you need and some way to post into it remotely.
Then you'd create a page that views everything you've added to the DB.
What sites are you looking to publish it to at the same time? Some of the bigger micro-blogging/social media sites like Twitter and FB have great API sections. Twitter is extremely simple to interact with.