SSI is our most enduring recycler relationship. An early volunteer (or was he staff?), John Billings, worked at SSI and volunteered at FGC. Our contact at SSI is Jade Lee, who is incredibly knowledgeable, upfront, and great to deal with. What they accept: Any e-waste (monitors, TVs, computers, parts, other electronics). Do they payout? No. We pay SSI $.12 per pound for "mixed" e-waste processing. CRTs and LCDs we pay a flat $6 fee each. Big LCDs and TVs the fee increases. How they process: They break stuff down into finer-level constituent parts than we care to do, and have logistics figured out to sell to/ recycle with a bunch of different companies/ recyclers. Their processes and recyclers are actually really well documented on their website (cheers!)
Here is a great article elaborating the two central ways that PCB recyclers process boards: smelting and chemical leaching. In short, smelting is way better. And if the slag (depleted/ melted circuit boards with valuable and toxic metals removed) is reformed into construction material, that's environmentally ideal.