Oh sure, you can register trademarks which are household names, but only for particular uses. For instance, I could put out a product called "Airport" - even a computer-related product, as long as it wasn't a "wireless hardware/software solution." Even then, the language is so broad that I could probably fight it in court should they decide to sue me.
There are a number of
mp3 players with the word "pod" in their names. There are even more mp3 player accessories, speakers, computer accessories, lamps, etc. with the word "pod" in the name - because they're looking to trade off of the iPod name.
I think the only reason you don't see more players with the word "pod" is because they want to differentiate themselves FROM the iPod, which is the market leader, and it may not make business sense to remind customers of your competitor's product in the name of your own. And of course, "pod" doesn't exactly mean "music player" - it's really kind of a stupid name when you think about it.
I never suggested that copyrights had to be protected like trademarks - just that it was illegal to reproduce anything you'd like in a blog. There is no special blog law that lets you copy someone else's work fairly. At least, nothing outside of standard Fair Use, which is WAY more limited than most people think it is in order to be fair.
Things that ARE completely fair to use, though:
The likenesses of celebrities (although not any particular photo unless you take it yourself)
VERY short excerpts from a larger work
A single frame from a feature-length film
Something that highly transforms the original work (photo-collages, images photoshopped to the point where you can't even identify the original, etc.)
Parody (although parody hasn't had as much protection lately as it has historically)
Much of Fair Use and the Public Domain has eroded over the past 30 years. Copyrights, which were originally intended to be limited, are now for all intents and purposes unlimited, since they extend beyond any reasonable expectation of a lifetime.
Mickey penis should have been in the public domain for years now, but isn't.
