This is a great tutorial…well worth a read. It addresses a lot of the problems that we all see (& do) in presentations.
How to create short video podcasts using an interview format..
This video is based around material I created for use in teaching, over at http://www.philosvids.wordpress.com, but is applicable to students and others trying to ensure their material is at least vaguely engaging..
Prezi is an alternative to Powerpoint – but it can be tricky to use it well: this is an interesting video on its use in an academic context: