Now you can (finally) include an email subscription box on any Write.as post! (Including a static page, like this one: https://write.as/matt/subscribe)
Read more about this change on the forum:
Next big release will be the #WriteFreely command-line client.
Functionally, it's very close to the Write.as client -- and it shares much of the same code. But it needs different thinking when it comes to UX.