Unfortunately, it seems Blogger has chosen to end FTP uploading support by March 26, 2010.
That means I will have to stop using their services and rebuild this blog with something else (probably WordPress), as I like having all the html and css on my own server and not on someone else's (especially since they can always pull stunts like this one in the future).
The old blog posts will remain here, either as they are under some "old blog" link or migrated to WordPress (or whatever I'll end up using for the new blog)