I've just made a little extension for the Epiphany Web Browser, that makes it possible to have a "Blog This" button in the toolbar (instead of the labelled bookmark you get when drag'n'dropping a bookmarklet on the toolbar). Hopefully it should work with several Blogging plateforms but I have only tested it with WordPress so far. The main idea and a lot of code are borrowed from the EphyDeli extension by Ross Burton. To make the extension configurable (blog adress, and blogging plateform) I've also adapted some code from the epilicious extension. Remarks and contributions are welcome !
The extension can be downloaded here.