All I can say is, "It's about fricken time!":
More here: Google Launches WordPress Plugin For AdSense And Webmaster ToolsGoogle has released a new plugin for publishers using WordPress. The official Google Publisher Plugin offers support for Google AdSense and Google Webmaster Tools, with more services likely to be added in the future.
On the Google blog: Inside AdSense: Google Publisher Plugin beta: Bringing our publisher products to WordPress
The actual Plug In is here: WordPress › Google Publisher Plugin (beta) « WordPress Plugins