Media Convert is a free online file converter. The sites lists a huge number of file formats – video, audio, image formats etc up to 50 MB in size. It will even convert and upload to your mobile phone (useful for video?). It’ll be interesting to see how long it lasts.
A lot of formats are supported. Main formats are : # Raw text, HTML, XHTML, Microsoft Word, RTF, PDF, PS, Open Office, Star Writer, Pocket Word, Word Perfect # CSV, dBase, Microsoft Excel, Pocket Excel, Lotus 123, Quattro Pro, Star Calc, Open Office spreadsheet # MathML, Star Math, Open Office math # Microsoft Powerpoint, Star Impress, Open Office presentation