willybfriendly - 5:59 am on Nov 17, 2009 (gmt 0)

I believe that the Yahoo Groups TOS page still contains reference to web beacons. So, the answer to your question would be "Yes" if you have not opted out.

If memory serves me correctly, opting out is pretty much a temporary and futile gesture, so an unqualified "Yes" might be more in order.

Be advised, I have not lookes at the TOS in probably a year, so things might have changed.