Ok, so it's a Beta but I've been running it for a month now and still happy. newer interface. no update problems and runs ad-watch to allow or block "unknown" processess. The Beta gives you a serial number for a pro version or an upgrade if you own and original 2007. So I have Pro version beta for free, pretty cool.
Click here for ad-aware 2008] and just sign up as a beta-tester hassle free. Enjoy.