Related to this but different enough so that I think it deserves its own question.
I'm the sysadmin of a small business, and by 'sysadmin', I mean 'by the seat of my pants' (still in university, not a lot of real-world experience, etc). I'm not ignorant, just inexperienced.
Anyway - we've got about 10 office employees whose computer usage consists mostly of using a web browser, pulling up Word occasionally, and interacting with our company's database through FileMaker. Our current batch of workstations are 5-year-old Dell E520s that literally never get shut down. I'm not worried about hard drives failing - by and large, most important files are saved on a networked drive - the big deal is just plain old energy efficiency. We're a small business, and I wrack my brains every day trying to figure out ways to shave a few dollars here and there from our overhead, and shutting the workstations down at 5p and firing them all back up at 9a seems like an easy way to do that (not to mention the tangible performance benefits that come from restarting Windows XP, as opposed to letting 10 tabs of FireFox leak memory all night long :P).
This may be an extremely stupid question, but what do you all think?