You're still running the classical 2D-era presentation tools, e.g. PowerPoint or Keynote? The 3D-era has just come since OSDC.TW 2010.
I gave Something Xiaolongbao talk at the most major open source developers conference in Taiwan.
Next Slide - Mouse Click, Space Key or Right Arrow Key
Prev Slide - Left Arrow key
First Slide -  Key
3D Mode Toggle -  Key
For 3D newbie, try  key to turn off 3D and fall back to 2D. :)
At the OSDC.TW day 1 early morning, I wrote pptx2html53d.pl, a Perl script to convert from PowerPoint .pptx file to 3D HTML5 .html. I'll make it open later. Basically .pptx file is a ZIP file. It's pretty easy to parse .pptx using Archive::Zip and XML::TreePP Perl modules. pptx2html53d.pl generates a HTML5 source code.
At first, I also used SVG's feColorMatrix feature for 3D. It's however cancelled at this moment as not working well. And also Chrome 5 for Mac seems it could not run SVG's filter element. The slides above are updated as Gugod gave me nice advices around CSS3 usage of text-shadow.
Buy 3D glasses in town and enjoy 3D presentation now.
* Original post written in Japanese（日本語はコチラ）