I don't have any membership at movieflix.com, so I don't really know whether they use any DRM protection or not. I prefer Windows Media streams to Real Media, they are easier to record and convert.
I prefer to record Windows Media streams with
WM Recorder. I can also recommend freeware
WebVideoCap and shareware
Jaksta.
I don't think it is a good idea to convert videos from movieflix.com to DVD, but you can try freeware convert Windows Media .WMV or .ASF videos to DVD using freeware
DVDFlick.
To convert to portable devices you may use
WM Converter ,
Jaksta or freeware
MediaCoder. Please let me know what kind of portable devices you have so that I can make a better suggestion.