My FAT PS3 just went YLOD again, for probably the 5th time now. So I'm looking into other companies capable of doing the work with a longer than 4 month warranty. That website posted looks promising, but it's $90 + shipping and the warranty requires you to pay shipping both ways every time. Not to mention that their $90 price is for them to just do the reflow or reball, if anything is actually broken and needs replacement you have to pay added costs, fine print will hit ya.
As far as I'm aware, local to me, there is only one place that repairs old FAT PS3 models, they charge $70-80 and do a 4 month warranty, but I've had them repair my PS3 4 times now.