Chris,
Since you are a Capture One pro, I wonder if you've been able to get C1Pro working with the WiFi capture? I've been trying but without success. (I never tried C1Pro tethered when I had my MkII's.)
And FWIW, I have had no trouble getting the WFT-E2A working on a Windows XP Pro system via external WiFi (LinkSYS) router in my networked environment. The only difficulty I had was whenever another machine running Vista would be turned on that was also connecting to the network via that LinkSYS router. Every time it did, my camera's connection would be lost. So we now keep that notebook turned off when I'm using the WFT-E2A.
I'm running a couple of 1D Mark III's but only have one WFT-E2A.
What I do is set up card 1 (CF) to capture RAW images only and on card 2 (SD) I capture small JPG images. It's the images from card 2 that get sent via WiFi so they can be viewed really quickly on the PC. Works very well.
Cheers...