I did this one last week. I had thought about doing one today, but not sure if I'll get around to it (just over an hour left of office time).
UPDATE: Yeah, not enough time. I spent most of it reading some blogs (I read really slow), and then cleaning out some of my e-mails collecting in my Gmail Inbox. I got rid of about 2,000 e-mails, mostly ads (Victoria's Secret, Amazon, etc.) and Facebook notifications (___ posted a comment). Time to get out of here!