I am not sure if any of you use them, but I have done so in an attempt to create a real time feel allowing visitors to see what others are reading.
I was surprised to see only traffic to two different articles and assumed Google penalized me.
Feedjit seems to be very unbalanced and if you think about using them, beware that your visitors might get the wrong impression and see a lot less traffic than you actually get.
Feedjit Live - Updating in real-time
This is the feed to my site and if you click on the site, chances are you will not be showing up.
Another free tool bites the dust.