I would have been fine with including Portugal. In fact I think it's only proper to do so when we're talking major colonial powers in America, but come on, Sweden?
If I remember correctly we had something like 200 people there lol. Sure it's an interesting part of Swedish history and Sweden was a great political and military force in Europe during parts of the 1600s but if you add Sweden you'd have to add a dozen others at the very least. I like the original concept of concentrating on the major powers, but Portugal should have been included.
There were a little over 600 colonists at the time the Dutch took over, but to that must be added the colonists who ran off and joined the Indians, those who ran off to Maryland because life as a colonist was simpler under the more easy-going English rule, and the fact that after the Dutch had occupied New Sweden, they found the Finnish and Swedish woodsmen to be such excellent settler material that they actually sent one of them, a certin Israel Helminen (an ethnic Finn), back to Sweden to recruit more colonists. Some two or three hundred made it to America before the Swedish government forbade any further recruitment of emigrants. A generation later,the people still speaking Swedish on the Delaware (some had moved elsewhere and/or assimilated with the English) had increased to 800 and asked the king of Sweden to send out pastors from the Church of Sweden to see to their spiritual needs; in the meantime, their parish clerks had held services, but they felt this wasn't quite sufficient. The king obliged, and three Swedish-speaking parishes were maintained this way - the English, as usual, didn't mind. In due time, as the Swedes were absorbed, the number of Swedish parishes maintained shrank from threee to one. The last Swedish minister administering to the spiritual needs of the people of New Sweden died in Wilmington, Delaware (formerly Fort Christina) in the 1820's. By then, the Swedes and Finns had basically been absorbed by the Anglican church. (Sweden and England were generally on friendly terms.)
Since all early colonial populations in what is now the US bred at a tremendous rate, the number of people descended (in part, of course) from the people of New Sweden must number in six digits, perhaps more. Ask a population statistician if you don't believe me.
Also, apart from supplying the ancestors of of John Hanson (the first president of the Continental Congres) and John Morton of New Jersey (one of the signers of the Declaration of Independence), the Swedes introduced the log cabin. At least, such a building demonstrably existed in Sweden-Finland (largely still forest country) at the time, but not in England and the Netherlands (cleared farmland).
None of this makes the Swedes on the Delaware comparable in importance to the Portuguese or even the Dutch, but I'd argue that they were at least as important as the Russians. Admittedly, this is on a rather humble level, far below the five Big Ones.
Oh, a final note - so many young men ran off to join the Indians because the forest life of the local tribe, the Lenni-Lenapes (who got on famously with the Swedes) was quite similar to forest life back in Sweden at the time.
Ahem. Sorry for the lecture, folks.