Since I rarely tweet and mostly follow people/organizations for informational purposes, the best lurker client I have found is a Vista/Win7 gadget called Sidechirp. I can stick it on the edge of one of my monitors and it will quietly (I turned off the bogus sounds) show me up to the last 50 tweets from people/organizations that I follow and I can make it a pleasant BLACK color scheme to blend in with my black background. :-)
Just my $0.02 on this topic.
-VM
Just my $0.02 on this topic.
-VM