I'm not sure if someone pointed this out yet, but there is a PV for Vault That Borderline! It is a bit LQ though.
http://www.youtube.com/watch?v=0YxvQ8WKKoI
Anyways, I'm looking forward to getting it, despite not having a PSP. *Sadface*
Thank you for this link!
After seeing this, I realized how much I like the direction and setting in all the videos. They're really awesome to watch. I can hardly wait for the other two!
Also, a new version of the 3rd PV has been released.
http://www.youtube.com/watch?feature=player_embedded&v=q4eyXH_zXMcDifferences:
In the end, when it shows a lot of different parts of the game together at once, it plays the part of the main song that was played in the 1st PV (You'll understand if you watch the 1st PV, then both versions of the 3rd).
Also, there's a part at the end that says that you can get a backstage pass (apparently from the premium shop site, whatever that is), which allows you to get a code for "The world is all one!!"
You can also get a code for a special Shiny Festa version of Haruka for Cinderella Girls.
(This info is almost exclusively from reading the katakana, so someone who can read Japanese might be able to tell you more than what I said)