Here are a short list of things that possess more elegance than Movable Type’s export file format:

• XML,
• SMTP,
• the C string API,
• the C multibyte string API (mbsinit, wcrtomb, mbsnrtowcs, etc),
• the C++ grammar specification,
• C++ template error messages,
• the BIND zone file format,
• Bourne shell parameter expansion involving spaces,
• PHP,
• CSV,
• GNU libtool,
• wGetGUI,
• POSIX regular expressions,
• MPEG-7,
• the mplayer code base,
• the Cisco VPN client,
• the ld(1) manpage on the UNIX system of your choice,
• the sudoers(5) manpage,
• Makefiles generated by GNU autogoats,
• Eric S. Raymond,
• ICCCM,
• pretty much everything.

Feel free to extend this list in the comments.