I didn't knew Belgium and Netherlands have some special treatment for high tech products -- I'll look into it.
Regarding Panama, I have no information about them, but I'd personally keep things within Europe.
Re: 'just pay your accountant or lawyer', not to pounce on you but this is incredibly naive. Accountants and lawyers who spend 95% of their time doing mundane things like the books of the carpenter down the road are not qualified for this type of work. Any high-tech company owes it to itself to find highly specialized professionals, who will pay themselves back manyfold, even if you think they're expensive. (heck they are expensive. most charge 150 euro and hour or more, plus office overhead). Still when you're a real company (i.e. not doing 10k a year in iFart apps) it can be money well spent.
It was more of a joke, I was mostly trying to underline that I imagine this to be only for big companies.
Do these guys have a website ?
Anyhow, just the cost of the incorporation isn't the major criteria. I'm looking more at the total cost for such a thing: the total administrative costs over a year plus the total taxes must be well bellow what one would pay locally otherwise it's not worth the trouble.
As most expenses (accountant, rent) are rather fixed costs, this means that the whole thing becomes feasible only for companies that exceed a given income/profit.
I don't know about Luxembourg, but Belgium and the Netherlands also have special tariffs for high tech products. You'll want to look for specialized council though, most 'regular' accounts have no idea.
Thirdly, several countries like Panama have no corporate tax at all as long as you don't live there. Depending on what your life goals are, it may be an idea to build up a retirement account there. Again it is highly dependent on the circumstances.