Nutritional Information:
Silkworms - The Benefits of feeding your reptile and pet the silkworm
The Feeders - BambooZoo [Good comparison of a variety of feeders]
I'd like to add that Silkworms also contain the enzyme serrapeptase which has properties that increase calcium metabolism, and also reduce pain and arterial plaque. This properties have been validated by Cheri Smith using silkworms on rescued bearded dragons to my knowledge. Overall, Silkies are incredibly soft-bodied, very high in protein, and low in fat. They are arguably one of the most nutrionally sound feeders available...but as always, variety is the best for any herp.
And just a couple of additional side notes: I have had immense die-offs from mishandling chow and larvae... while the article claims that disinfection and sanitary practices aren't as necessary as typically recommended, I would prefer to err on the side of caution and sanitize your hands before working with the larvae. They are incredibly prone to bacterial infection and disease and spread like wildfire amongst cultures (Mulberry Farms has an unforunate experience with this, amongst others).
In addition, another tip I have to offer is to use plastic canvas grating for the larger larvae or later instars... the #7 grating allows frass (poo) to fall through the holes while keeping your silkworms clean and happy. Simply elevate the canvas with something in the bin and keep the food and larvae centered... they don't move around much ; )