Intrusion Detection for WinNT/2K/XP

Can someone recommend a good intrusion detection package for Windows NT/2K/XP?  I see a lot of good stuff for linux out there, but not so much for WinNT/2K/XP.

I'm not looking for a firewall or packet filter, but an honest-to-god NIDS (Network Intrusion Detection System) that will log activity to a database (SQL Server?!) and detect slow attacks.