Hey, my few cents worth...I've not heard when (or if) it will be available in any US retail stores. The only means that i know of currently for buying the IL 1946 DVD is from an online outlet. I used
http://www.gogamer.com but check the NWS Online store that is linked from the main page here as well.
Having all of the versions since Forgotten Battles in one package is a definite plus, the big pdf file listing all of the planes is a big help too.
Just remember its a DVD, so you'll need that optical drive. It does have some copy protection software called "SecureRom" as part of the deal requiring you to insert the disk every time you wish to play. The 1C/Maddox team have already released a patch (beta) that covers some cosmetic boo-boos tweaks a few planes flight modelling. Although I've not loaded that on yet, I'll wait to see if it changes. But still....
I'm loving it, even with copy protection hassle of an extra step.
MudPuppy