WordPress App for Windows Phone 7 has been released by Automattic.
With the mobile app you can write and publish post, moderate comments, add a page, check your stats, upload photos and more.
According to the official description,
WordPress for Windows Phone is an Open Source app that empowers you to write new posts, edit content, view stats, and manage comments for your WordPress site.
Current version is 18.104.22.168 and is available for free download from Zune Marketplace.
Download: WordPress for Window Phone 7 [0.78MB]
images via wmpoweruser