Hi, there!
German online security news service heise.de has published an article on virus threats in NTFS ADS data today (<http://tinyurl.com/63e92/>).
Since avast!4 (unfortunately once again!) is not amongst the tested AV products, I wonder since when (say, which version) it does check the ADS. I'm quite sure it does, because W32.Dumaru for instance is listed in the positive list. But NTFS ADS checking doesn't seem to be a matter of course at all...
Regards,
suntoucher