I generally have no complaints with the computer I've been given to work on at my client. It's reliable, it's plenty fast, and they're good both about quickly fixing what goes wrong and not getting in my face with a bunch of arbitrary standards. However, the one complaint I have is that since I program with my headphones on, and since the computer actually sits under my desk and sort of behind me, I can't see or hear drive activity. Working on a laptop most of the time, I'm used to seeing the drive access light flicker as a sign that “something is going on”.
I knew I couldn't be the only person for whom this was a problem, and I was right. A few moments of Googling turned up Disk Tray, which seems (so far) to be a stable and capable little app for showing disk activity by blinking lights in the system tray.