Thanks for the help everyone - I think I'll try giving Viewsonic a call sometime today.
I cut off power to my speakers to see if that would have an effect, just in case, but there was no change. I also tried plugging it directly into the outlet rather than through my surge protector, but that didn't change anything - maybe I'lllug the whole comp over to another outlet to test it out sometime tonight, but that's more work than I feel like doing in my hour break between classes
Interesting you mention the subway - My comp is on a desk against a wall which faces the El (Chicago's elevated train). I am about 2 floors above it however. I guess we'll see if maybe moving it to the other side of the room does anything then!
EDIT: Well...I think I found the source of my problem
I was using my roommate's computer - which is about 10 feet or so away from the same side of the building my computer is against - the one that faces the El - and I was going to look into warrenty information and customer support from viewsonic. No sooner did I open the viewsonic website, that I noticed his monitor doing the exact same thing mine has been doing
The exact same, barely noticeable but enough to annoy you, screen location instability. So, I guess it's probably the El that's causing it then...but now I don't know what the solution is, if there even is one
I certainly don't feel like surrounding my monitor with ugly sheet metal and taking up all my desk space