The next Microsoft Filter Plugfest has been scheduled for September 13 - 17, 2010. Registration should be opening soon. Please check back on this link: http://www.microsoft.com/whdc/driver/filterdrv/IFSPlugfest.mspx
At the Filter Plugfest 23, the Microsoft Filters team will be extending coverage to “Network-only” filters (e.g. Firewall filters).