Ultimately, here is the story as told by Giles and O'Keefe. After these initial videos came out, ACORN and some of its allies, mainly Media Matters, claimed that when they came to the Philadelphia office they were immediately thrown out. This was something said by CEO Bertha Lewis and Carol Hemingway, head of the Pennsyvlania ACORN. They said this on news outlets like CNN and CSPAN and in the local Philadelphia newspaper. OKeefe says the full video lasted about 32 minutes and his battery even ran out towards the end. This video is edited and about 9 minutes though O'Keefe says he plans on releasing the full and unedited video. What's also interesting about this video is that the interaction is mostly with Catherine Conway-Russell, the office manager at this ACORN location. She seems to have a lot of knowledge of tax laws for an office manager. Meanwhile, ACORN spokesperson, Scott Levenson, released this statement.
This is another example of Fox Entertainment treating concocted video as if it's actually news, The police report we filed contemporaneously proves our clear understanding of this scam that was being portrayed.
Finally, Andrew Breitbart also stated that there are more videos and they will be released though he was coy about time and place.
UPDATE: The video is also now posted on Big Government. Also, Media Matters, which was mentioned by name by O'Keefe, has responded on their site by characterizing the video as "heavily edited".