This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
Plain text files by themselves do not contain any font information. You need to add extra information for that. Decide upon a file format which supports fonts like rtf, html, odf, pdf etc... and use that for your file.