Just realised mobile phone wouldn't be much good as need to be able to control the camera - that is work for the pc.
Perhaps a PDA?
Will the PDA be able to capture the video & control the camera (ie load DMK drivers into PDA) then transfer image files to pc - probably I need to ask the manufacturer.
If can't have images sent direct to PDA, perhaps can still access the images from the pc via wifi/bluetooth AND use PDA to access camera controls through the pc (ie install DMK drivers onto pc and use PDA to access).
The DMK needs to transfer a lot of data quickly (via firewire) and needs a lot of storage. I really think you're better off with a laptop, and perhaps an external harddrive to capture the data onto.
I do use a PDA, an HP iPAQ hx4700 running The Sky Pocket Edition, to control my telescope, but I suspect that these devices don’t have the grunt and capability to what you are asking.
When I transfer MS Word docs, spreadsheets or e-mail betwixt desktop PC and PDA, it is a reasonably slow process for relatively small amounts of data. I recently ripped my purchased copy of “The Space Race” on DVD and then transferred the 196M file to an SD card in the PDA and it took a couple of minutes just to transfer the 196M file which had already been rendered for the PDA Windows Media Player format.
All the applications on the PDA are also quite cut down in functionality to make them run under the PDA OS with the relatively scant PDA SW and HW resources.