Version 2.4 of the Akismet plugin for WordPress is available now. This is a maintenance release that fixes some bugs, and includes some preparation for new features in a forthcoming version. [...]
This version retains backwards compatibility with old versions of WordPress, but it is the last major release that will do so. The next release of the Akismet plugin will require WordPress 3.0. We’ll continue to maintain the 2.4 branch of Akismet with security updates for users who are unable to upgrade from old WordPress versions. (Official Akismet Blog)
Note: Emphasis theirs
The latest update sends all comments deleted by Akismet to your trash bin (which will solves the “my comments never show dilemma”) as well as various bug fixes.
Although the techs at Automattic are kind enough to keep 2.4 alive for legacy WP blogs, users refusing to update their blogs may find their comment section overwhelmed by human spammers in the future.
If ones host (or WP service platform) is preventing them from updating their blog to 3.0, then users should seriously consider finding a new host ASAP or outsource their comment threads to IntenseDebate or Disqus (both with support Akismet).
(Image Credit: Norebbo)