There are a lot of PPT conversion tools available with different pricing and different conversion options.

 

We recommend using a tool which generates one singe SWF file and not a file per PPT slide like http://www.wondershare.com (PPT2Flash) , http://www.presentationpro.com/ or http://www.cpslabs.net . A very powerful tool is Articulate Presenter, which adds additional animation and graphical options to PPT.