I can't speak for erichocean but I've played around with both UDP and NaCL (http://nacl.cr.yp.to/). NaCl is very easy to use, and quite fast. It's not easy to install, but once it's there, it's nice to use.

And because of my playing around with NaCL, I've come to the conclusion that encryption isn't the hard problem---key management is the hard problem.