There is an option to embed fonts in the document while saving in powerpoint from Office97.
PowerPoint 97
Choose File, Save As
In the Save As dialog box, check the "Embed TrueType" box under the Save and Cancel buttons
Click OK and continue saving normally
PowerPoint 2000
Choose File, Save As
In the Save As dialog box, click Tools then click Embed TrueType Fonts
Click OK and continue saving normally
PowerPoint 2002, 2003
Choose File, Save As
In the Save As dialog box, click Tools then Save Options
In the Save Options dialog box, put a checkmark next to "Embed TrueType fonts"
Click "Embed characters in use only" if you want smaller PPT files but don't need to let others edit the files if they don't have the embedded fonts or ...
Click "Embed all characters" if others will need to edit the presentation using the embedded fonts. This will produce larger PPT files; if you embed unicode or doublebyte fonts, the files will be MUCH larger.
Click OK and continue saving normally
Some interesting limitations are present. More details at *www.rdpslides.com/pptfaq/FAQ00076.htm
Arun