I have not read all of this trainwreck of a thread, but it appears that the pro-IP side is saying, in essence, that government monopolies are OK so long as it can be proven that they result in an increase of production. Part of the way in which their claims are bolstered is by saying that any use of an idea by anyone but the originator is theft; there are grand appeals to emotion, talking about starving artists and developers.
It must be said that to copy the text in a book does not deprive the author of the use of those words, nor does a copied song take anything from the musician. All that it does is take away their monopoly on their production. It recognizes that there is no scarcity in the arrangement of matter; that particular arrangement can be done over and over again.
But what of the free rider? There are always those who, for sentimental reasons, for example, will pay the creator for the works no matter how easy it is to get a free copy. I regularly do this myself for some indie games that I like; I want to vote for their survival, in essence. I could easily download their entire collection for free, but there are benefits to buying the game and registering: access to tech support (they will not help without a key), beta patches, etc. Other games are moving into paying for playing online, such as the many MMORPGs. There are rumors that Diablo 3 will be pay to play online, and it is not an MMO. Other games can be pirated, but need a proof of purchase to play online.
General software will move to being pay for service; that is how many of the Linux companies stay alive. Want tech support? Cough up the cash. OSes are moving more towards the open source realm, and the incentive there is to share costs. Many of the Linux developers are paid to do so by large companies. The phone realm is moving that way, with Symbian set to be opensourced and the rise of various Linux derivatives, such as Android. Other software is paid for by advertising; this is how the Mozilla people make their money, and Opera too, IIRC. Firefox is the biggest opensource success story, though there are others. such as the Apache web server and the GNU compiler collection. The Webkit rendering engine has been succesful, too, being used in everything from Chrome to Safari to the Qt toolkit.
What about art and music? I say, what about it? Some artists are moving into letting users name their own prices (even free) for a download of the song, yet people still pay for the music. Even if they didn’t, the artist can make money on concerts; that is the only thing an artist has that is scarce. A notable example of this is Radiohead’s In Rainbows. Even now, artists still tour. Smaller ones use the tours to make their cash (think indie bands). Let us not forget those souls who wish to make music, the rest of the world be damned. Those people had no profit motive before, and they still have none.
Art in general can, as before, be paid for on commission. TV shows and radio shows make their money by advertising, and they already commission shows. I think YouTube, for very popular videos, had plans to share ad revenues with producers to incentivize them to make more content. I do not know if that plan made it through or not.