So, what have I been up to today? Well, for starters, I've just proposed a patch a for D7 core that would add another stage to the bootstrap process. Currently, the Drupal bootstrap process is broken into something like ten steps. In the last step, DRUPAL_BOOSTRAP_FULL, Drupal finishes loading its core files and then loads all of the enabled module. The patch that I posted moves the loading of core files into DRUPAL_BOOTSTRAP_CORE. All that it leaves in DRUPAL_BOOTSTRAP_FULL is the loading of enabled modules.