Thank you for your views.
The main advantage I see in freicoin is that it reduces interest with all the good effects that would cause. The problem is that not many people here thinks in fact reduced interest would be beneficial. I first heard about anarcho-capitalism about a year ago, but I think austrian economics theories are pretty compatible with Gesell. I like both, but I don't like Gesell's "free land" nor "free money (freigeld) made by the state" nor austrian's "time preference" nor the "deflation is good/neutral" dogma.

Let's concentrate then in another advantages.

1) Transaction fees are not a problem, but demurrage fees reduce them. Bitcoin holders are receiving a service that bitcoin transactors pay for in form of transaction fees. I mean in the future, currently holders also pay through monetary inflation. But in the future it will be an externality.

2) Demurrage fees increase the velocity of freicoin. That is good for merchants that will make more sells.

Although miners prefer bitcoins over freicoins for their superior speculative value, with merged mining, miners will get the bitcoins the namecoin and the freicoins and sell the ones they don't like for whatever they get, because they don't have additional hashing costs. At 1 satoshi per freicoin, I will buy all the freicoins if no one else want them, so mining won't be a problem.
The problem is acceptance from users and that relies heavily in the acceptance from developers entrepreneurs. We need them to adapt the current bitcoin software and services to also work with freicoin.
Well, first we should code freicoin...
Making a fork from namecoin or collaborating with multicoin (that already have merged mining) seem the better alternatives for now.

A currency that stabilizes its price through changing the monetary base is being discussed in another thread, and I think it could be done better with demurrage than with destructive fees.

I don't want to change the stable monetary base feature of bitcoin, because I don't want the people in the forum to confuse demurrage with monetary inflation. In fact, the monetary base is more constant in freicoin than in bitcoin because it recovers lost wallets.