The only requests for this cake are Chocolate and blueberries. It will probaly be two layers so I want to fill it and was thinking that is where I'd incorporate the berries. I've never played with fruit filling in cake and heard it can be disasterous...suggestions?! Also if anyone has an amazing chocolate cake recipe I would love it. And any tips on chocolate plastic, as i'll be using that for the first time to create some roses for this cake. Thanks!

You can get canned blueberry pie filling. That would be the easiest way.

Just a couple fo suggestions: don't forget to pipe a dam of icing around the layer before adding fruit filling and don't make the filling too thick. If it's too thick the layers want to slide.