It is definitely a good resource and has come up before. Beardies and blueys don't have exactly the same diets, but as far as information on macros, Ca:P, what not to feed, it is great.

There isn't a ton of bluey specific information out there so using something like that to determine oxalates, goitrogens, Ca:P ratio etc and figure out yourself if it is a decent food is a good idea if you understand what it all means!
I would use it mostly for feeder insects and greens / veggies though. There are some weird things like spaghetti on there and it doesn't have lots of good protein sources for blueys like dog food, chicken etc.