This might be possible for development, since they do have an IPhone mini-site setup...
http://iphone.dailymotion.com/usA look at one of the videos the mini-site lets an IPhone generates MP4 formatted URLs like this within the launch page, within an <EMBED> tag:
http://iphone.dailymotion.com/cdn/H264-512x384/video/xeb3yt.mp4?auth=1289081475-cb86a288be0fcb6358755da21a8b4c57
Looks like all you need to scrape to make a playlist for this to work is the video ID and the auth string the actual site would have given you.. (/video/ + video_id + .mp4?auth= + authstring, for example..) I'm getting this from the actual video's loading page and not the main page that has the front and back navigation, but it seems to be something you could scrape from the main page as well.
Hope this helps anyone who takes this on.
-Byron