I want to state:
If Pentax have delivered manual control over video (aperture/shutter/iso), and offers either 25p or 24p frame rates, I will buy a K-5.
In a heart beat.
I have been waiting for this development for years. I recall in film school wishing that I could get a 35mm SLR with a motor drive that would do 24fps and take a bulk-load film back. Once DSLRs arrived, it was only a matter of time for them to tackle video. When the K20D could do a burst mode, I wished that it could shoot just a LITTLE faster and a LITTLE LONGER. The K-7 nearly had me ... but it crippled the control of video.
According to the rumors, the K-5 looks sets to capture my filmmaking heart. I wish/hope that it does a true 24p ... but I'm OK with 25p if I have to (just slow down the footage and sound by a few percent in post.)
I can't wait to shoot HD and mount up my SMC Takumars... or my Sigma 15-30... This is very exciting. I have already sold a bunch of cameras and lenses to make room for the K-5.
I hope Pentax delivers, and that other filmmakers pick up a Pentax. There is no reason to leave this field to Canon. The 5D Mark II is not the world's best cine camera. This could be a real boon to Pentax.