2008-07-01: Just write simple tools to handle your text entries. One tool converts Colino markup into HTML and sends HTML to output.
What language should I use?
PHP is probably our best bet. I already know PHP, it comes with functions for handling files, strings, and arrays, it comes with OS X, it can be run from the command line, and I can take the scripts with me if I ever decide to leave OS X for another platform. Bonus: I can use XCode for developing PHP scripts.
Links
On running shell scripts from AppleScript