Google Blogger has added the function to import,and export within your blogger blogs according to blogger buzz.
Here a few of the added features quoted from blogger buzz.
Merge two or more blogs into one. Have a few scattered blogs and want to get a fresh start? Now you can combine comments and posts from multiple blogs into a brand new blog.
Move individual posts from blog to blog. Cross-publish your posts on multiple blogs, or transfer large batches of posts from one blog to another with a single click.
Back up your blog to your own storage. It's never a bad idea to create backup copies of your own content, and now you can easily export an archival copy of your blog to your hard drive with a simple tool.
Move your blog somewhere else. Our standard Atom XML export format will open up new blogging channels between providers, and let you take your content with you should you decide to move somewhere else. And of course, if you decide to come back to Blogger, importing your export file will get you back up and running in seconds.