I use SquareSpace for my blog hosting. It is a great service and I highly recommend it. I also use BBEdit for writing my blog posts in Markdown. The one thing about SquareSpace that I don’t like is the inability to push images up to the site via FTP. The only way I can store images on the site is to use the File Management tool which requires a lot of extra steps.
I have decided to try using Dropbox to host my blog post images. I already have a paid Dropbox account so using it for image storage seems like a “no-brainer”. Images simply need to be stored in the Public folder and then you need to grab a link to the image from either the desktop client (on the Mac you control click on the file and select “Copy Public Link”)
I’m not sure I will make this a permanent procedure, but I am sure interested in trying it out. Word is out that the new version 6 of SquareSpace is coming soon and will have some awesome features!