Nifty item, and I don't think it's too powerful ... I don't, for instance, presume that the "lore of hell" includes every conceivable secret ever known to mortalkind. The memory effects alone are a nasty drawback, never mind that the wielder would likely get a reputation for blood magic he might find hard to live down -- or live through.
It could stand a little more info. How long do the memories last? How long do they take to find? I'd also throw in another drawback - that the wielder get compulsively secretive over revealing the ring's power, going to some lengths to disguise his true source of information.
I wish I could give it a higher vote, but to a degree, I'm with EchoMirage: I do understand that goons are extras, but without any personality traits attached to the list at all, this is just a list of possible goonish positions in a Big Bad's entourage ... and most GMs can figure out that much anyway. One or two personality traits per Goon would make this more than a collection of red shirts.
Terrific concept, and makes perfect sense ... heck, some of the armchair theorizing about "mithril" and other fantasy metals have had them come from the transuranic "island of stability."
Beyond that, what's "technological" about this? Radiation is a naturally occurring phenomenon. Uranium is a naturally occurring metal. No one would call rules for what happens when a character is struck by lightning "technological," however much electricity is ubiquitous in our modern world.