TODO

Build Module View Page
Save New Activation State to app/etc/modules/zzz_module_manager.xml
Make core_resource versions setable
Handle orphaned attribute models in eav_attribute and orphaned increment models in eav_entity_type
Add option to hide core modules

What exists?

Module model and collection, gathers info ftom app/etc/modules/* files and core_resource table, without relying on Magento's config parsing and merging
Adminhtml grid view of modules

Where?

Adminhtml, System > Tools > Manage Modules

So, basically the information is there, now the main work is building the UI.

This is a little project I am doing on my own because I couldn't stay at the MageHack location, but I still wanted to contribute something.