Here is a tutorial for setting up the performancing Firefox blogging extension to work with DasBlog:
1: Go download the blogging firefox extension from: http://performancing.com/firefox/
2: With Performancing installed right click on any webpage and go to Performancing -> Blog This Page
3: You should see a screen like the one below, click the add button to configure the performancing extension to use your DasBlog.

4: Select Custom Blog from the blogging service drop down list:

5: Select Blogger API from the "Please select your blog system typefrom the list below" drop down list.
Add the Blogger XML-RPC API address to it will most likely be www.yourblog.com/blogger.aspx or www.yourblog.com/blog/blogger.aspx
The DasBlog.info blogger API is located here for example: http://dasblog.info/blogger.aspx

6: Add your DasBlog username and password and you can now post to your blog with the performancing Firefox extension.

Reposted for stevenr at dasblog.us