- Handle time zones.

- Make ezmlm also return previous and next message numbers.

- Figure out how to determine dates on the messages.
  - Parse the first Received: line or the Date: line

- Make a better front-end for sites that want to have the same
  installation serve out multiple mailing list archives with different
  owners.

- Improve the install and configuration documentation.

- Write template documentation.

- Build a proper spec file.

- Seperate the generic parts of the CGI front-end into another generic
  library that uses the template library.

- i18n

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Ideas from other implementations:

List of posts by a given author (divided by month)
Author index / searching
Thread tree display
Downloadable attachments
"raw" message view
Generation of RSS feeds
Language customization
