When you filter your RSS feed by keyword, it would be nice when you can set a Hashtag. All correspondece that will be filtered have a special Hashtag. So listener from my twitter profile have specified posts. In the Twitter guidelines for spam is described that automatted posts must be have a context.
Example: Posts from RSS with filter "travel luxury hotels" become a hashtag #luxury #travel also can be the same RSS Feed have a filter with "travel cheap flights" that become #travel #cheap or #flights
i will hope this is understandable ;)
this is only a improvement, but not a must