Good policy...
95% of the machines I deal with are department machines, which means they are always up to date and have a virus scan run daily. Very few spyware problems on a daily basis... which reminds me, I got Norton loaded back on but I've got to add Spybot and Ad-Aware tonight before I start surfing merrily.
Heh...since I'm not currently carrying any large files around, I went ahead and put both Spybot and Ad-Aware on my usb drive, along with the current definition files for each. I've used that a number of times already.
I really like this little guy! I could always use a bigger one, but that's just how computer stuff goes...