All this high tech / high $$$ talk about lighting made me bring out my little optical flash trigger that I haven't used since getting my Canon ST-E2 infrared flash trigger.
A LOT can still be done with these little optical units. I think I bought mine for about $15. And everyone has at least one old strobe sitting around. Attach one of these babies and now you have a remotely operated flash.
Just a quick example:
#1) on camera 430EX flash direct-on (yuck! example only!) - no remote flash
#2) on camera 430EX flash bounced 180-degrees back over my head - no remote flash
#3) same as #2 but with remote flash triggered from about 8' directly in front of me and bounced up onto the ceiling.
All three with identical Photoshop post-processing.
#4) the bugger itself
#5) the bugger on my spare Metz - look ma, no wires!
A surprising level of work can be done with these little buggers. Play around and experiment with different manual flash output levels to achieve what you are looking for.