I did something similar too . . .
The darn loggers are all over the place in the official wow forums. I consider myself a somewhat computer savy person and I'm really kicking myself for clicking that darn thing.
I guess I got a similar question to OP. I did the whole virus check, adware check, etc. and its not turning up anything. Yet I'm pretty darn sure where I went had a logger on it. I'm currently running vista x64, defender is on, Avast! is on, firefox with adblock, and automatic update is on when this occured. I'm super paranoid right now have yet to log back into wow or any other sensitive websites for fear alone.
I threw caution to the wind and did a number of things: I killed both my XP and my Vista installs. I formated and killed both partitions using Gnome (Ubuntu 6.10 disc) Partition manager. I then went back to my acronis backups ( i keep a clean XP and a clean Vista install and all the apps minus the drivers). Both drives and operating systems are now restored and running. Both operating systems were fully updated as soon as they came online. I even killed my WoW folder and all its addons. I have even formated my temp drive (where I keep my swap space drive).
Before I continue, my operating system(s) and my personal folders (my documents) are on 2 different drives. I've performed an anitvirus, adware, etc on these separate drives with no issues. Is it safe to say that they are also clean? The reason I'm asking is that I don't have any place to store that much info offline. I have approximately 750mb worth of music, pictures, recorded shows, movies, misc stuff, games, and documents of a personal nature. I just don't have a spare spare harddrive of that size to meticulously sort through. Am I safe or am I still in trouble?