It appears that nothing is being done with any of the other WebmasterWeb extensions, so your .net could still be worthwhile. If you were to build a traffic-pulling website and then start marketing it, there would be far more value in the name itself. WebmasterWeb could then be trademarked and the other extensions would be useless to anyone else.
It appears that I'm a bit of a contrarian to most others on this forum. In my opinion, it isn't simply the domain name that provides value. If a person just buys a cool DN and doesn't market it or develop it, then it doesn't matter if it's the coolest DN ever. All appraisals are simply opinions of a DN's potential value based almost exclusively on rough estimation and personal opinion.
Domain names are like gold or diamonds. They don't have any intrinsic value, but we humans really like to make pretty things with the stuff, so we *assign* value to them. We can evaluate their technical merits (purity, flaws, color, etc.), but the actual dollar value is only whatever a buyer is willing to pay. Some people will pay more, some people will pay less. It depends on the value a buyer places on that particular commodity.
Therefore, IMHO, any appraisal is simply a guesstimate, and a DN isn't really worth anything at all until it has a buyer. Even the most lame DN can become a blockbuster if it is developed and actively marketed.
