Wikilog version 1.1.0 has been released today. This version and the following branch (1.1.x) target the MediaWiki 1.16 branch, which was released on July 28th. This release can also be used with MediaWiki 1.15.
Wikilog is the MediaWiki extension that powers this blog. Wikilog enhances MediaWiki with some common blogging features, making it a wiki-blog hybrid.