Sorry I'm so late to the party. Happens every time I get swamped with work and something big IP related hits the fan. Anyway, I'll try to make this brief...(yeah right when have I ever done that)
. Anyway, I haven't read all the posts but here is my take. Sir Poonga is right saying something is a "MAME cabinet" implies that the MAMEdev team made or endorses the cabinet. Sure you can read it differently, but the fact that you can read it the way I indicated opens up the MAMEdev team for potential litigation. The MAMEdev team must be vigilant about the enforcement of a trademark otherwise the mark is destroyed. Additionally, there is a legal term called inducement to infringe...meaning your product has only one purpose, to aid in the commision of infringement and by providing the product to others you are making them commit an illegal act. Don't think for a second NAMCO or NINTENDO won't pull the plug on MAME if they think their bottom line is being affected. The MAMEdev are doing a little CYA (Cover Your @$$).
Now is there fair use and are they being a little over zealous...yeah.... probably. Sometimes there is only one way to describe something and not using MAME in the title can affect a description. For example, let's say...hypothetically, that MAMEMarquees obtains a lisence to make and distribute marquees of the traditional MAME ilk. Let's say I buy one and after several years of enjoyment give up this hobby and want to part out my cabinet. Well, the only way to describe my marquee to inform the buyer what the marquee is regarding is to use the word MAME. Much like I would sell an antique COKE bottle. Here I am not using the MAME name to market a product, but describing what the product is. Now keep in mind I have very limitted trademark work (I deal 99.99% in patents only), but I fairly certain this would not violate a mark. Only problem is, do you really want to go to court over a $30 marquee...which keep in mind is probably the only way ebay will let your auction back on the site with mame. Now someone mentioned why Ford doesn't do the same thing. Again, my bet...without doing any legal research is they can't; however, if they could, they probably don't because if they did they would be paying millions in legal fees to have some attorney spend every waking moment shut auctions down. The reason I'm hedging here is the Krako example. Sure Krako makes aftermarket products, but be damn sure they already got a lisence to use the mark. Heck they even will acknowledge marks at the bottom of the add (e.g., Ford is the registered mark of Ford Motor Company, etc, etc).
Lastly, as someone also mentioned earlier... tradmarks are only valid if used in commerce. Unless someone can point to court cases that define freeware as commerce, I'm fairly certain this means a monetary transaction. No exchange of cash for good (here MAME)..no commerce.... no trademark. So MAMEdev be careful what you do, you might lose your mark in an effort to enforce it. Also enfocement of a mark you don't have yet is illegal and can result in the loss of the mark. You're not quite as bad off as Mr. Foley because it is clear that MAME was in use and you can rely on the TM rather than an R. Mr. Foley had niether and was trying to enforce...he would've been toast. However, nobody here should bite the hand that feeds them. Don't piss off the dev team or there may be no more MAME dev going on. They don't have to do this you know.
Anyway, that's my take just off the top of my head. Got to get back to work ...if this is still hot this weekend or next week, I'll post a more legally polished rant with case law for those who are interested.
Patent Doc
PS - Kev I haven't had a chance to read that patent article you posted yet, but the sky isn't falling despite what you see here. I'll try to e-mail you why I say this later tonight or tomorrow.