Irfan, please disregard my previous comment. I validated some of my incorrect assumptions with testing last night and notified Warren Wu of my results. IDS integration with ESX is very easy when the IDS is placed in an isolated promiscuous-enabled port group. I plan to post an article regarding this issue on SearchServerVirtualization.com to further clarify. I also plan to contrast ESX IDS integration with that of other virtualization platforms (XenSource, Virtual Iron, MS Virtual Server).

Thanks for helping me get to the bottom of my own incorrect assumptions.

~Chris Wolf