As I suspected some time ago, but at a much later time than I thought, Google is finally going to switch off the “Publish via FTP” option from Blogger (http://blogger-ftp.blogspot.com/2010/01/deprecating-ftp.html, http://blogger-ftp.blogspot.com/), causing much ranting on Twitter
The FTP feature was great, in that you got all the benefits of the Blogger editor interface, but all the files were published as flat files to a custom web server. Better still, you could cajole Blogger into saving the files as PHP, thereby providing a cunning integration with flat-HTML websites, without the use of a database or blogging software installed on the server.
Apparently, this caused Blogger a great deal of headache, particularly in resolving support incidents: only .5% of active blogs used FTP for publishing (although I bet all those were “real” blogs, rather than spam or SEO-drivers).
I think this means we’ll need to install the blogging software on our servers, software such as WordPress (http://wordpress.org/). We need a mechanism which allows PHP scripts, so that the content can be embedded within the website itself, not hosted at some crummy http://blog.domain.com/ separate domain. This rules out the Google Custom Domain option.
Less than two months’ notice is not great, but hopefully we should be able to improve on Blogger anyhow.
Matthew Skelton 
I'm a web designer with little programming knowledge, so I'm wondering if you yourself need to convert into using rss feeds or is your only recommendation wp. I'm actually looking for something really small without the database requirement.
The deadline has been extended to 1st May: http://blogger-ftp.blogspot.com/2010/02/ migration-deadline-extended-to-may-1.html
The solution I found was Movable Type in static publishing mode. I'll write up the details when I get chance, but basically, use Linux symlinks to “alias” the mt and mt-static directories so you can run multiple sites from a single code base/install, and create a new theme for each site you run. The inbuilt editor is not very good, so I'm looking to replace this with CKEditor or similar.