Convert & Save MS Office Word/Excel files to Open Office or PDF format using Google Docs & Spreadsheets

1) Upload a supported Word or Excel file to Google Docs & Spreadsheets
2) Right Click on the file in the Google File manager (on IE and Firefox only)
3) Select Save as Open Office or PDF for Excel files or Save as HTML, OpenDocument, PDF, RTF or Text for Word files.

http://thinkabdul.com/2007/09/01/convert-save-ms-office-wordexcel-files-to-open-office-or-pdf-format-using-google-docs-spreadsheets/