General presentation resources:
Digital Presentations in Education (on Scoop It!)
How to TEDx: 6 Presentation Design Tips for Your Next TEDx Event
Life After Death by PowerPoint (Don McMillan)
Presentation Zen
TEDx Organizer Resources - Designing Your Event - Great Presentation Design

Example of the use of quick short text phrases in a presentation:
Larry Lessig - Free Culture

Example of presentation featuring the use of image and symbol flooding:
Dick Hardt: Identity 2.0

Example of presenting in split screen with effective practices in multimedia design:
Mishra, P., & Koehler, M.J. (2008, March). Thinking creatively: Teachers as designers of technology, pedagogy and content (tpack). Keynote address at the 2008 Annual Meeting of the Society for Information Technology and Teacher Education (SITE), Las Vegas, NV, March 3-7.

Examples of Pecha Kucha presentations:
Dan Pink
Felix Young
Pecha Kucha 20x20
Pecha Kucha Night

Examples of Ignite presentations using 20 slides in 5 minutes:
Ignite Show

iPad apps that can be used in presentation design: