I love the idea (one of many listed in my evernote), but I really don't like the tag line. "Your personal Twitter favorite automaton" doesn't explain the awesome value this provides in curating and organizing my twitter favs. Good luck!
Love the idea! Have you considered this from a job search point of view?...go to twitter, search for #job and quickly build a list of jobs to be checked later. Especially if you summarise the content etc. Might be better as a separate service but it appears you have all the tools :-)!