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Key features include:
Three types of Debian image 'core', 'lightweight', 'full'
Both have:
Ability to install a full operating system on your phone
XFCE Desktop (very lightweight)
Working update manager
Ability to access files on your SD card and internal memory from Debian
Ability to set screen size on boot (you no longer have to download a certain image for different screen sizes!)
Full is includes:
900MB download, which is 3.5GB once extracted
Full XFCE desktop with all the addons
Lots of apps perfect for 'developing' including
Lightweight image includes:
500MB download, which is 2GB once extracted
Includes only apps required for everything to work, leaving lots of space for your own programs but having a smaller image
Core image includes:
*200MB to download 750MB once extracted
*Just the base system including no GUI just command line