Recently active ideas in twitterfeed tagged with feeds

Suggestion for a new feature : checking iCalendar (.ics) feeds and converting the events into tweets when they occur...

I like the idea of the 'exclude' filter, but it would also be great to have a 'negative exclude' filter. In other words, instead of only showing posts with the filter word, it would be great to exclude posts with a filter word, perhaps preceded by a "-", as in Google searching.

For example, if my filter was "-flickr" (without quotes), then items with the word "flickr" would not be passed through to Twitter.

Can I hope to see snipurl (www.snurl.com) support in twitterfeed ?
I love the functionalities snipurl has and tinyurl hasn't.

Sorry for my bad english.