In response to the orignal post, I've been running Belden's bonded-pair Cat5e for networking applications and "vanilla" Cat5/Cat5e for telephone and misc. control circuits. The bonded pairs mitigate performance degradation resulting from bends and harnessing during installation. This feature, along with a 350MHz bandwidth, yields installations that will easily meet the needs of 99% home users for many years to come. When properly installed, Cat5e DOES support gigabit Ethernet, which is more than sufficient for streaming HD and multichannel audio (when such applications actually emerge).

For a more detailed examination of the subject, see:
[Link: networkcomputing.com]
(The article is three years old, but still offers valuable insight.)

-Max