Post to Posterous from Windows Live Writer
Windows Live Writer is the best word processing application to write blog posts and then publish them online on your favourite blogging platforms.
Unfortunately, Windows Live Writer does not support posting to Posterous.com, which means you can’t benefit from having the great experience of using Windows Live Writer when publishing to Posterous.
Writerous (thanks Keshav) is a plug-in for Windows Live Writer that allows the user to create their post in Live Writer and then publish it to Posterous.com. It’s a small and simple plugin that does what it says to.
Simply run the MSI file to install the plugin in your Windows Live Writer.