Just to clear up some confusion, Redump.org is and always will be a public preservation project that is open to new contributors.
New accounts can be requested here: http://forum.redump.org/forum/13/guests … -requests/
For dumping CD's (with DiscImageCreator), the main hurdle is the need for a genuine Plextor drive. Over the years, we have been able to accomodate new dumpers by offering them locally bought Plextor/Plexwriter drives at affordable prices (around 20-30 EUR including shipping). We are still offering these services, so if you are a prospective dumper aiming to make a lot of contributions, but in need of an affordable Plextor drive, feel free to contact us.
Other media types and systems such as XBOX (360), GC/Wii, DC, PS3 each have their own set of tools and equipment that are needed for dumping.
Dumping instructions for every system, as well as undumped lists (not always complete or up-to-date) can be found in the Wiki.