The articel said "Sweden is leaning toward an interpretation of Bitcoin that will allow the nation to charge capital gains taxes on any transactions using the software"
So first nothing is decided yet, skattemyndigheten has refused to ansewer question about if or how bitcoins should be taken up for taxation in Sweden for years so they really have draged out things a very long time and it most likely will have to stay that way.
"view Bitcoins as what we call another asset -- just like art or antiques"
Secondly art and stamps coins and such things has had very special rules for quite some time before they got taxed simular to normal assets in Sweden so the fact that they compare it to art in this early stage of trying to draft up rules for btc really dosen't say anything about how BTC will finally be treated.
But if they finally will decide to see it as an asset and not like an currency your Bitcoin businesses shouldent need to register at finansinspektionen thats the logical consequence of it so if finansinspektionen still demands registration then there is no change in policy yet.
And in the section about miners "Wallin said the question is whether they should be taxed as businesses"
About the mining part the only logical thing if someone would have incomes coming from mining and they decide it should be taxeted would be that people would be allowed to deduct the costs they have for buying the hardware for electricity, cost for the location you rent to have the miners in and so on.
The problem for skattemyndigheten if they actually decide to try to tax profits on BTC is that they would also have to allow people to taxate losses people had in the btcworld to and the way bitcoins is set up they will never be able to find a working system for it without ending up having Sweden loose millions if not billions on it like they did on the way the rules for art was back in the 90's.
So the only logical decition is that the gov will keep things like it is now. No tax on profit and no taxation of losses because there is no way they can make taxation on bitcoins to work and there is no way people would accept to be taxated on profits but not allowed to deduct cost or taxate losses from the btcworld.