Great news! And in the right time!
I tried the example and it worked fine.
But when I integrante ofxSyphonClient in my VJ app, the following condition on SyphonNameboundClient.m never works, I had to bypass it:
//if (![self parametersMatchDescription:[_client serverDescription]]
// && [self parametersMatchDescription:newInfo])
And I usually work with GL_TEXTURE_2D, and because Syphon is using GL_TEXTURE_RECTANGLE_ARB, my shaders will have to be duplicated, replacing sampler2D for sampler2DRect.