The PowerPoint slides created for the Artificial Intelligence slides at the University of Virginia contain equations generated using TexPoint. TexPoint is a LaTeX add-in for PowerPoint developed by George Necula et al. at Berkeley. TexPoint is a Visual Basic PowerPoint macro that calls latex (miktex in my case) and ghostscript to generate good looking equations.
When using TexPoint, I instruct the macro to use extended metafile (EMF) versions of the output text. The EMF versions are not bitmaps, they are references to the characters in their TrueType (.ttf) versions as stored in the LaTeX font databases. The EMF versions are scalable, so they will look good as a small window on your laptop and as a larger window on your projector. The price we pay, is that the TrueType description of the fonts must be available on any machine used to display the presentation. PowerPoint presents the option of storing all the TrueType descriptions in the .ppt file it generates (File->SaveAs->Tools), but in some cases (for some reason) some of the fonts are not stored. Here is what you can do to manually add the fonts to your machine's font folder. PowerPoint will then find the TrueType fonts it needs.
Add the fonts from the directory you just unzipped to your machine's Fonts directory
In Windows XP, you can use Windows Explorer to effect the copy. Select all the fonts in the directory you just unzipped and copy (CTRL-C) them. Navigate to the /Windows/Fonts directory. Paste (CTRL-V) all the fonts here. The file copy operation behaves differently when pasting to the Fonts directory, so there are some OS-centric operations that will properly register the new fonts you've added.