Pete... 
I took a look around the Photobucket site and found this...
Photobucket files supported...
http://photobucket.com/faq?catID=29&catSelected=f&topicID=322
Images - gif, jpg, jpeg, png, bmp. Photobucket converts bmp files, which are not appropriate for the Internet, to jpg files, which are.
Note: The Image Editor does not retain the animation in animated .gif files.
Videos - 3g2, 3gp, 3gp2, 3gpp, 3p, asf, avi, divx, dv, dvx, flv, gif, moov, mov, mp4, mpeg4, mpg4, mpe, mpeg, mpg, qt, wmv, xvid, rm. All video files are converted to Flash Video (flv) format when you upload them.
swf - SWF file uploads are limited to Pro account holders. SWF files must be 10MB or less, and can only be uploaded through the Image & Video Uploader, the old Photobucket image uploader, or via FTP. If you want to upload SWF files into your Photobucket album, we recommend that you upgrade to a Pro account.
So I did a search for converting a ppt to an flv...
http://www.google.com/search?hl=en&q=convert+a+ppt+to+flv
I found this...
http://ppt-to-flv.downloadsoftware4free.com/
There's lots of ways to convert files these days...some of the software is even free 
Life Member David BB Linkmeister
US Army '78-'85 West Central Wisconsin
