XScriptorium, an ambitious AE scripting resource, has launched. The Drupal-built site was intended to be more user-friendly than current sites like Motionscript , redefinery, the AE Enhancers scripting forum, After Effects Scripts, and AE LiveDocs.
The site has just launched so there are birth pangs like missing source credits, though there is a function to reward source authors. More advanced search would be welcome, in addition to the current listings and Tag Cloud.
The AE Scripts Galore roundup summarizes other resources for scripting and expressions in After Effects.
Update: Not sure if I missed it earlier, but Advanced Search is there!