As you know Yahoo 360 is going to shutdown the service by July 13 2009. So if you have a blog on Yahoo 360, you can import it to MyOpera. It is beta version.
1. create an account on My Opera
2. Go to the import page here
3. Enter the Yahoo ID and Password and click Import Blog
4. Go to here and Click on prepare My download, which will give you your images
Go here and read more how to do the import of blog entries and comments from Yahoo 360 to My opera