Hi Dirk,
I highly recommend xlhtml project. It contains
- Excel 2 HTML converter xlhtml
- Powerpoint to HTML converter ppthtml
The result is returned to standard out. If you pipe that through a proc that strips out the HTML tags you have a clean and fast solution:
Sources:
http://chicago.sourceforge.net/xlhtml/
Reference:
http://www.linuxdevcenter.com/pub/a/linux/2005/05/26/textonly.html