Here are some presentations that I created and use to deliver in IBM events.
Most charts include speaker notes. They are all in Open Document Format (ODF).
I rarely use the full presentations, I select the best charts according to the audience.

• My official IBM Linux Presentation that include some insightfull charts about Open Source too
• The Best Linux Distribution
• High Availability Linux Clusters

I am also founder of the Elektra Initiative, and produced an Elektra Presentation that members of the community use to deliver in Linux events.

See also the articles I have written.