1) A short Youtube video that makes some good presentation points:
2) Useful examples:
http://www.cio.com/special/slideshows/2009/02/bad_powerpoint/index#slideshow
3) Two good talks about presentation delivery:
http://sixminutes.dlugan.com/six-simple-techniques-for-presenting-data-hans-rosling-ted-2006/
4) Lengthy but interesting read about use of PowerPoint:
http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001yB&topic_id=1
Guerilla Marketing
The Creative Process