I made these cupcakes recently for a friends high tea party!
Blueberry Lemon Cupcakes, with Lemon Curd filling, and Cream Cheese Frosting
Dark Chocolate Pistachio Cupcakes, with Dark Chocolate Ganache filling, and Ganache Butter Cream Frosting
I used a 10ml syringe (a sterile one from work) to inject the filling.
I used a Wilton piping tip for the Cream Cheese Frosting....sorry I can't tell you which one, I'm house sitting and I can't for the life of me remember which one I used at home!
The recipe for the Blueberry Lemon Cupcakes is on my blog! http://www.apparentlyjessy.blogspot.com