I want to thank you for the great article. I've read up on predatory/ scorpion fish and have kept a frogfish (black pictus) for several years now.
Recently I spotted a yellow (with red stripes) dwarf lionfish at a LFS. It looks much like the one in the article. I debated during the LFS visit, and even though I had a running bill going with some bagged corals I couldn't leave the store without that rare yellow dwarf. I will try to post a pic of it later when I get home.
I have a big reef tank upgrade planned this spring/summer and all along planned on keeping the reef's current home, a 120g 4'x2' tank, in the loop as a fish-only with a lionfish and perhaps a small dogface puffer, etc. The yellow lionfish purchase is putting the cart before the horse a bit but he is doing very well in my 150g sump-tub for now. I am considering putting a 92g corner tank into the loop barebottom for him ahead of my other tank project+reef swap. The lionfish is very friendly and will even eat from your hand, though I am wary of doing that hehe.
I use a feeding stick someone on the RC frogfish files forum suggested along time ago. This feeding stick may also help people who are having trouble getting their predatory fish to eat thawed food(see below). I highly recommend it, with a drop of selcon mashed/soaked into the foodstuff. The selcon adds extra nutrition and also smells great to fish (don't overdo the selcon though).
To make the feeding stick - take a long section of rigid airline tubing and force a small section of flexible airline tubing onto the end of it. Then feed a fishing line down tube. Tie it off to a handle or some sort on the top end, leaving short length of fishing line protruding from the bottom end of the tube.
You impale the food item onto the fishing line. If the fish gobbles up the line too far he will be on the flexible airline tubing, which is a lot more forgiving then a typical feeding stick. Another benefit to using this feeding stick is that it is transparent so may help to enhance the illusion that the food is live and swimming, especially with alittle 'puppeteering'.
Here is a pic of the veryend of my feeding stick. I actually keep a bit more fishing line hanging out than in this pic. I have a handle on the other end attached with a rubberband. If the frogfish (or other fish) ever gets stuck I can hold the rigid air tube with one hand while pulling the handle with the other hand in order to retract the fishing line.