(Feb 9, 2002) Bitstop is currently studying the Cisco Catalyst 2900 LRE (Long Range Ethernet) that will allow up to 15mpbs over 5000 ft over Cat 3 cables.
It also allows simultaneous voice and data over the same pair of
copper wire. No need to rip out existing PABX or telephone wiring in
your buildings. 
If successful, (Updated 2/12) Bitstop plans to demonstrate this on Feb 21-23 at Baguio Colleges Foundation, and again on Feb 26-28 Comdap, Baguio Country Club.