If you read Chief Justice Hughes' opinion, you'll see that. It's hard for me to believe, given that standard, that Wikileaks would NOT be covered as "the press."
As far as DP, I don't know if we would be covered in that capacity, since DP isn't set up as a source of news/information, but it would almost certainly be covered under the first amendment in terms of free expression of speech.
So...I don't think you're on the right side of interpreting the bill of rights here. However, feel free to link read the decision I linked, and let me know what you think.