Most of the WordPress hacks that Alex had written have been upgraded by him to support WordPress 1.0 Platinum (and later releases). These include:
WordPress Mobile Edition – A PDA friendly interface for your blog. It’s (almost) XHTML compliant.
Since Last Visit – Shows the number of new posts and comments (including indicators showing what posts and comments are new) since a visitor last came to your blog.
WP Photos – This hack automates including photos with your blog posts.
WP Group – This hack is lets you group a selection of posts on a single page. This hack is compatible with WordPress .72 as well.
Send him a thank you if you use his work.