We can do that too! (We can't specifically do SEK yet, although we're working on it - should have it soon)
We've tried to make all of this as easy as possible - you can associate bank accounts in different currencies with your Stripe account. If you make a charge in a currency you have a bank account for, we'll transfer it directly; otherwise we'll convert to your account's default currency and transfer it to that currency's bank account.
We done have some special needs though, so I doubt Stripe is right for us. We need a few more currencies and we expect to have the money transferred without any currency conversion ( If the customer pays in Swedish Kronor, we want the amount transferred to us in that currency ). Also we need support for at least one local card.
It's not meant as a put down or anything, I just fail so see what the big deal is with Stripe.