We really need an FAQ.
Read this thread, then decided (discusses the differences in threadings)
http://www.bikeforums.net/showthread.php?t=194545
I have no problems using EAI cogs with Phil hubs and I skid and skip. It also handled my suntour cogs fine (same threading as the EAI,
AFAIK).
What you shouldn't do is use cheap-o hubs or constantly swap between different threading systems.