What is Pocket Blog?
Pocket Blog extends your weblog to any Pocket PC device. Weblog entries are maintained offline. When Internet connectivity becomes available, such as when your Pocket PC is placed in it's docking cradle or a WiFi card is inserted, changes are automatically posted to your weblog. Pocket Blog also downloads recent weblog entries, enabling you to edit entries that were originally posted from your desktop.
Go here to see all the screenshots and how to use it and download it.