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Just checking out your wonderful display-widgets plug-in. Reporting what I think I found is a bug.
I innitially found that the plug-in shows not only published pages, but also pages with the new 3.x "auto-draft" status. (database: table: posts -> column: post_status -> value: auto-draft)
Looking some more into this, I think I have found the culprit. The plugin looks for pages with the status "published" in the post table. But I think it should look for status "publish". (without "ed")
Funny… I just came across this issue with another plugin I was working on the night before you posted this. You're right about the deleted posts issue too. The problem was it was showing ALL the posts of any status since 'published' was invalid. There's an issue in the WordPress documentation on that function, where it says the default is 'published'. My bad for not testing it out very much. Thanks! New release to come shortly.