Large amount of code added on each blog by the Subscribe by Email plugin

Hi

There is a large amount of JS code (630+ lines) added into the source code of EVERY blog on the network by this plugin (even the blogs that don't use the widget!). My default Twenty ten first post is now 450 kb (with subscribe by email in mu-plugins) instead of 168 kb (when I remove the plugin).

1. Would it be possible to put these 630+ lines of code in a separate JS file?
2. Would it be possible to load this only on blogs that did activate the widget?

Thanks!

Laurent