I’ve just finished a set of UDP nodes for Crysis 2 using the FlowGraph Plugin System.
UDP listener and sender, with multicast variants too. Should come in useful, e.g. for getting OSCeleton data from the Kinect.
The code and binaries (/binaries/Bin32/Udp.dll and /binaries/Bin64/Udp.dll) are available it’s own GitHub repository.