Congrats to Han and all with this long-awaited release!
Vista users may try the 4Gb patch with this version (see posts
https://www.subsim.com/radioroom/showthread.php?p=1122792 and
https://www.subsim.com/radioroom/showthread.php?p=1123736), so you don't have to wait for the Vista version (which will have less enhancements compared to XP version anyway).