Well not really dead but yahoo have just announced that they will be removing their backlink checker in a month or less! That means: -none of your tools what uses it will be working since there isn't any other source then yahoo to check backlinks! -You won't be able to find new keywords what you can rank for, since you won't be able to see competition for them. -Won't be able to reverse engineer and get high quality backlinks. -Won't be able to spy on your competitors. When this will happen at least for me it will kill for me EVERYTHING and for almost all of the experienced guys here as well. $hit sucks!