@AndrewKatz
Good points, I think. But I'm not sure that you're right in the last para about the US courts attempting to enforce their jurisdiction on transactions outside the US.
Pentalpha clearly isn't in violation of a US patent if it simply manufactures and sells in HK; that's indisputable. As for the *inducement* to sell an infringing product within the US, what I think you've missed is either that (a) Pentalpha has interests in the US, or (b) Pentalpha is a subsidiary of Global-Tech, which I'm guessing is a US corp. SEB must have taken action against some US-based entity, claiming that that entity had induced infringement in the US. So, all hunky-dory.
As for your point 3, about how you can become non-infringing. Saying you "don't know" on your download page is pretty clearly no longer sufficient. I don't know why Rik says in his opening paragraph that this ruling makes it *more* difficult for someone to be sued for inducing infringement; it appears to make it *less* difficult. In your case, you are presumably being "knowingly blind" when you say that you "don't know" if a US "patent" is being infringed. You presumably have a pretty good idea that some US patent is being infringed, but you can't be arsed to do the legwork to find out which one(s).
However, there is a simple solution. You say on your download page that you don't know, and so you have to forbid anyone in the US from downloading your software. End of story, at least if you're not losing out financially. On the other hand, If you're trying to make money out of this, you have to be clever. Move the plausible deniability along a bit. Post anonymously on message boards suggesting that US users download from Tor, and so on.
There's another simple solution. If you don't have any US interests, sod it. Just let them download; the US courts can't come after you. The worst they can do is to keep you out. Not a big deal for me - I was in LA and San Francisco last year, and the promised land it aint, not by any stretch of the imagination.
The US courts will get the message eventually. Most of my downloads are non-US anyway, and this will presumably only increase in the future, so I don't particularly case.