Web based favorite edit is intended for those who want to change favorites more often, who want to do experiments with different URLs without connecting always device to PC via USB. For example I have my radio in sleeping room next to bed and I don't want to move it around...
Also I have noticed, that radio URL stored in user list (file browse_list) is buffered much longer than radio URL stored as type 0 (radio) in fav.xml file. Perhaps different parameters are passed to mplayer for each type of media (radio/tv/podcast...).
Adding / changing favorites via web interface is feature which I have seen on one older internet radio (Soundbridge) and I hope William will provide it in some form in his upcoming firmware (big thanks for his work).
I have also added very simple FM radio settings editor, because current possibilities for adding / removing presets are let's say very limited.
I just wanted to play a little bit with my radio until William's firmware is out