I'm looking for network taps, both 100baseTX and Fiber.  Does anyone know of
a good supplier for these?

In case someone doesn't know, a network tap is a little box you splice into
an existing cable and it has a separate port that mirrors all traffic on the
wire so you can sniff/analyze the traffic.

Also, I know ATM and frame taps are available too, so if anyone has any info
on these, it would be greatly appreciated.  

Jay