I am running Resolume 4.1.3, and with Syphon pref on, I can see Syphon in the sources section, but nothing shows up underneath it. Not even Simple Server. But the QC picks it up easily. For the reverse, Simple Client can always see Resolume’s output.
As for channel specific video effect control, I can already see DJs requesting it on V-DJs forums, I’ll chime in with my vote there.
V-DJ Pro 7.0.4, Resolume 4.1.3, OS 10.8.2, MBP Retina