Windows Live Writer and All in One SEO Pack are two really good pieces of softwares available for WordPress users. Windows Live Writer allows users to write and publish blog posts from their desktop, on the other hand All in One SEO pack gives users the ability to optimize the post title for Search engines, and allows users to specify custom keywords and descriptions for the post.
However the two of them do not go hand in hand in the sense that when you post from Windows Live Writer you will still have to go to the WordPress admin dashboard and add the parameters for All in One SEO pack, adding a minor inconvenience to users.
I wrote a plugin called All in One SEO Pack Windows Live Writer Bridge, which aims to bridge this gap, by allowing users to specify All in One SEO Pack details while publishing posts from Windows Live Writer.
This plugin is basically made up of two components, a WordPress plugin which monitors for posts written remotely and a Windows Live Writer plugin that allows users to add All in One SEO parameters.
Once you have installed both of the plugins, you can select Insert –> Add SEO Information and enter the parameters for All in One SEO Pack.
However the only minor caveat in the plugin is that you will have to enter the SEO details in source mode, this is due to the fact that Windows Live Writer does not allow plugins to add Html comments in Edit mode.
Once you have entered the SEO Details, you can publish the post as you would do normally, the WordPress plugin will interpret the information and create the appropriate entries in the database for All in One SEO pack to process.
I will be enhancing this plugin making it much more easier for bloggers to add custom fields while posting through Windows Live Writer, however I hope that the current code is good enough to address a issue, many of WLW and All in One SEO Pack users have faced for a long time.
Please do provide your feedback on whether or not this plugin will be helpful to you and other ideas you want me to improve upon.
Disclaimer: I am the author of this plugin.