I am not sending much traffic to dialers, but
MONEY TREE does quite well for me.
They have a quite agressive dialer ( but I think all dialers are agressive nowadays ), for many different subniches ( this should guarantee long holdtimes ), cool banners ( movie screenshots saying "Free Sex Download"
) and relatively high rates ( currently $1.50 per UK minute, the new rates are visible only after you sign up ).
