Weird. I have Win2K and IE6 right now, and I can log in fine. I have no idea what could be going on.
After some serious digging w/ other developers one of them told me that there is a "feature" in IE6 that discards cookies from host names that have an underscore in them. So hou_dev_02 will have all of its cookies kindly discarded by IE6 but if I use the IP address directly then IE6 will happily accept the cookies and allow me to log in and manage the critter to my heart's content...