There isn't much documentation available how to test API calls once you have set up a service using Services 3.x on Drupal 7. Here's some code I used to verify the requests were properly constructed and signed.
It's a bit bizarre when DrupalCon is in your home town. It's even more unsettling when it's combined with Symfony and Webvisions taking place at the same time. For a week, there was a good chance one could run into a fellow drupaller at any random streetcorner.
Last week I released Domain Blocks 7.x-3.0-beta1 which should be used on Drupal 7 sites using Domain Access 7.x-3.x branch. Since the support for Domain Access 7.x.2 branch is discontinued so is support for Domain Blocks 7.x-2.x branch.