Kerm Martian has created a new web service called SourceCoder. On the SourceCoder page, you can select a *.83p or *.8xp TI-83/83+/84+ BASIC program and upload it. SourceCoder then shows you the source code in human readable format. There are additional options for HTML or phpBBCode/InvisionBBCode, ostensibly to aid in collaborative BASIC debugging discussions. It also accepts *.8xi files (Pic0-Pic9 picture variables) and converts them to GIF and ASCII art.
The site is already slow, so please be patient with SourceCoder.