I'm not following links at the moment, just pulling data out of the tweets themselves. I've had some success filterring spam out but intend to imropve that further as soon as I get a chance. There are some more fairly simple things I can do, but there's probably a limit to how good I can make that. As for the vagueness, I think that's in part down to the 140 char restriction, people choose to put the tweet out and hope people will click through to find out more. Hopefully if I start scraping the additional data it'll not turn the results upside down but just level most of them up.