List of Figures

Figure 1:	Yentas talk to each other and to their users' web browsers	33

Figure 2:	Clusters and overlaps	39

Figure 3:	Degrees of anonymity	51

Figure 4:	Showing the user how to submit an evaluation.	61

Figure 5:	A typical evaluation. The small bars on the left of each source line are color-coded.	61

Figure 6:	A sampling of interests. Real users tend to have many more than shown here.	79

Figure 7:	Recent messages received by this Yenta, and options for dealing with them.	79

Figure 8:	A typical message, and how to reply.	80

Figure 9:	Replying to a message.	80

Figure 10:	Manipulating attestations.	81

Figure 11:	Recent news about this particular Yenta.	81

Figure 12:	A sampling of the help.	82

Figure 13:	Adjusting internal parameters, for those who demand knobs..	82

Figure 14:	Some infrequently-used operations	83

Figure 15:	If Yenta is manually shut down, this is the last page it shows.	83

Figure 16:	Some selected statistics from fielded Yentas.	93

Figure 17:	Simulation results. See text for details.	107