Some bot code is available at GitHub.
You should be able to actually sign up and edit articles.
How does this work?
Articles that are under discussion on Wikipedia are automatically copied here by Robyt. If the article is retained on Wikipedia the article is emptied on Deletionpedia. If the article is removed on Wikipedia we don't have to do anything here. So if an article is not deleted we won't delete the article here, Robyt will just put a template linking back to Wikipedia. But articles are often relisted for deletion again soon.
You are welcome to sign up and help with the project.
It's okay (encouraged even) to edit articles here once they have definitely been deleted on Wikipedia (unlike DPv1), but it's advisable to wait until articles have been definitely deleted on Wikipedia. Like that you can still go into the history of an article and find your edits.
Click on random page to get an idea about what kind of stuff gets deleted on Wikipedia. A lot is great quality articles written by people who care and spent a lot of time on them, including research and adding references.
Back in 2008 deletionpedia.org was launched for the first time (not by Guaka). The project stopped working after a while.
Some useful pages