I thought about moving some of my posts from my old blog to this one - Windows Live Writer doesn't really have an option to copy posts between blogs (yet?), but since it supports the Blogger API, it's easy to access and open those old posts nobody wants to read anymore...
So I added a new weblog account to WLW and connected to Blogger and immediately got my blogger theme look and feel in Writer's document area - this works great. The problem was with how to access all of my old posts since WLW only offers the listing of maximum 25 (latest) posts... To show more, registry tweaking is required: open the registry editor and scroll down to the WLW Preferences section: HKEY_CURRENT_USER\Software\Windows Live Writer\Preferences\PostEditor\RecentPostDefaults, where you'll find a list of guids, representing your blog configurations. In the Data column, you'll see currently set numbers of posts to be displayed (5, 10, 15, 20 or 25). Simply double click on these items and set the higher number - 50, 100, ... When you return in WLW the number will be (re)set to that number and you'll be able to access much more posts than before.
Now, to republish old posts in my current blog, I'd have to copy the post into a new blog post, set its original date and title and publish it in the new blog.
[Be careful when editing registry settings - changing wrong keys can lead to unpredictable results. Don't try to do this if you're not sure of what you're doing...]