Below is a list of components required to achieve a homegrown dual USB to IP camera. (Hope that made sense) 😛
For my setup I have the following Hardware;

1) Seagate Dockstar
2) CA-42 Nokia Cable
3) 2 x Logitech C910’s
4) Trendnet TPE-112GS
5) Old Outside CCTV Camera Domes
6) Relevant tools to dismantle the Dockstar and Cameras.

At home I use a POE switch so I try to power everything I can off this.  The Dockstar itself takes 12VDC so i tested the current draw of the unit with both cameras running and it came well under 1AMP, therefore when the 48VDC POE provides is step down to 12VDC I had plenty of current to play with.  Initially I tested with a 100mbit Step down adapter however I had duplexing issue with the network interface on the Dockstar and I couldn’t seem to change these settings.  I have since purchased a Gigabit version to use.  The CA-42 cable is utilised to get serial connectivity to the Dockstar, a really good guide on adding a serial header to the device can be found here : http://www.yourwarrantyisvoid.com/2010/07/21/seagate-dockstar-add-an-accessible-serial-port/ Highly recommended read.  As a result I wont go into this unless I get time 😛

Well that’s about it for the core hardware components of this project, if I have missed anything I will be sure to add it as I go with the guide.