I need the address for the Blogger FTP server.or
How do I FTP my updates?or
Why do I get nothing but FTPConnectionClosed when publishing?
Coming from a normal web site publishing environment, you're used to composing your web site offline, then publishing the web site by sending the updates, using FTP, to the host server for the web site. That's similar to what you do with a Blogger blog, but with one major exception.
When you use FTP to publish a blog, Blogger is the FTP client. There is no Blogger FTP server. You still use the plain old Blogger Post Editor (with one rare alternative) to compose the posts. FTP Publishing under Blogger simply lets you publish the blog, instead of to BlogSpot, to a third party provided host server, outside the BlogSpot name and physical space.
(Update 2010/03): And now, even FTP Publishing is no more.