Originally posted by John Poirier Maybe you should just upgrade your cell phone.
in all seriousness, the iphone 4 is a wonderful video camera, assuming your main footage is shot at 720 the iphone makes a great b cam when you need lots of depth of field or shooting scenes with tricky focus
i cant say about other brands, but in good light the iphone 4 is definitely up there with dedicated video cams, albeit with very limited functionality, and a poor codec, but if you shoot with these things in mind
remember with video the more equipment you have the better- A/B/C cam will give you the ability to make much more interesting edits
and 3 cam's recording audio and another source recording means you're got decent records of the talent and 3 sources of ambient to chose from
the k7 is also a great camera, much much better than the 550d, maybe even better than the 7d in some areas; weather resistance, price, stabilisation, pentax lenses are much better than canon and at lower prices, manual focus lenses feel lovely and are super cheap, canon dont make cheap lenses and all their lenses except L series are dogs to focus
although the 7d was a big pull, and the 550d makes it almost impossible to not be interested. Of course i'd love to stay with pentax, but my lenses are all manual, so using them on a canon body isn't a problem- but pentax have to get this camera right for video or at lot of people are going to have to get a 550d/60d, the kx is a nice choice for video- i prefer it's output and it does 24p, but 60fps is something I think you'd miss, and currently pentax don't offer this
whatever you do, don't get a nikon, i've been shooting the d90...