I (the company that I work for) use Caymas Systems NAC and I (the company that I work for) love it. In fact, they are pushing more and more traffic onto the NAC. I (as a person who work in technology) am a little concerned with Caymas Systems, Inc.
Back in April I asked support about Vista support. I was told they are working on it but could not give me a date for it's release. June 11th will make 2 months. And on June 11th I will re-open the support ticket and ask the question again.
As a company they have been having financial issues. I'm concerned and a little sad by the whole thing. If anyone from Caymas Systems is reading this....I hope everything works out for you guys. You have a great product and I have enjoyed working with you and want to continue to work with you in the future.