We need experienced programmers, as well as translators, and documentation writers to help continuing development of the DebianInstaller.
Here's how to help:
Sign up to the debian-boot mailing list and introduce yourself.
Fix any of the DebianInstaller/Bugs. Or check to see if bugs still exist.
Test the DebianInstaller on your hardware, especially if you have access to non Intel computers.
Process installation reports. See DebianInstaller/ProcessingInstallationReports.
Check the TODO for tasks needing attention.
For non coder contributors
Translators, see the translation status page.
For coder contributors
CheckOut the installer from git and svn, using mr.
See http://git.debian.org/?p=d-i/debian-installer.git;a=tree;f=doc/devel in git for developer documentation.
read a quick overview of the design.
cleaning up library udeb dependencies
Mac and DebianInstaller/PowerPC/OldWorld
Debian Installer i18n documentation. This is the first document to be read by people who want to help translating D-I