With the addition of the Plugin Update Notification into WordPress 2.3, it is now more important than ever before that plugin authors maintain and update their plugins on a regular basis. Failure to do so may see their plugin dropped from wordpress.org while user’s migrate to other more up-to-date plugins.
Some of the most popular WordPress plugins have already been tested and listed as WordPress 2.3 compatible plugins. Sadly many will never be compatible as their authors have given up development.
Developing a successful and popular blog or website is made easier by using WordPress, even more so now that canonical redirection and update notifications are included by default.