I think I read somewhere that a lot of froggers in europe use springtails as a staple food.
I don't know how many cultures you'd have to have to keep a frog fed well with springtails though, and most people think it couldn't be done because it is too hard to dust springtails with supplements.
However, I still feed Drosophila as well - it would indeed be very hard to satisfy more than a small number of frogs with springtails alone.
Like many soil arthropods, springtails are much higher in calcium than nutritionally-deficient feeders such as flies and crickets, so there isn't really any need to dust them (dust does not stick to them anyway!). However, a varied diet is always your best defence against nutritional deficiencies.
That's not really a noob question. As AJ stated, many froggers overseas use springtails just as much as flies. I find that feeding springtails eventually makes feeding my frogs much easier. I only feed off flies 2-3 times a week, and I feed springtails off once or twice per week. Many of my vivariums are crawling with springtails at any one time, so I can go several days without ever having to feed my frogs.