I don't know how popular a technique this has become, but I've been using portable recorders + lavs instead of RF wireless mics for over a year now. I use a Sony ICD-SX712u portable recorder and a lav mic that came with my Sennheiser G3 kit.
I just plug the lav mic into the recorder, mic the...
So I do a lot of docu-verite or "reality TV" style shooting as a one-man crew. I've found it extremely hard to cover conversations between people with a single camera. So I started training myself to shoot holding two cams at once. While I've used everything from DSLR's to camcorders shooting...