I've had a few complaints from people who said that, not being administrators, they felt unable to participate fully in [[Wikipedia:Deletion review]] because they could not see the content of the article under discussion.
I've decided to act on this, and have placed the following notice on the page:
"Some administrators take all good faith requests for undeletion on this page as de facto requests for temporary undeletion for the purpose of debate, and will honor such requests, unless the content is defamatory, copyright, a personal attack, or otherwise unsuitable for publication, for the duration of the debate. They reserve the right to will be not undelet if there is reason to suspect that this forum is being abused. Pages undeleted for this purpose should be clearly marked with a link to [[Wikipedia:Deletion review]].".
This should solve the problem. Basically I'll undelete stuff that satisfies the above criteria while it is being discussed on the forum, in the interests of encouraging full participation by all editors.