Many high-tech presentations involve some sort of show casing of a mobile phone app. This site has a number of iPhone mock ups that could work great in presentations. With elementary image editing skills, you can take a front-facing image and past your device screen shot in. More advanced Photoshop users can probably get the 3D tilting to work.
The full list of iPhone mock ups are here on Design Beep.
Someone suggested this link on Twitter, but I forgot who it was... If it was you let me know and I will give you credit.