Phame is a little wonky when you use it right now.

In particular:

• editing existing posts is really hard. You have to URL hack...
• making a blog public with a custom domain has enough magic involved to be rather tricky

...and I expect a few more usability kinks to get ironed out.

(see https://github.com/facebook/phabricator/issues/572 for the "in particular" items report.)