In Spring of 2011, I'm generally spending Tuesdays and Thursdays at the Illinois Informatics Institute, in room 306 Main Library (formerly the LIS Library). Office hours for spring 2011 will be on Thursdays from 9 to 10 AM, but they'll be held in my office at GSLIS. My calendar is online, and if you see an open time that works for you, contact Christine Hopper (-cmhopper, at illinois.edu-) to schedule a meeting. You are also welcome to ping me if you see me on AIM (as jmu2m).
Outside of office hours, email is the best way to reach me, and you can generally expect 24-hour turnaround. If you flag the email in the subject-line as EMERGENCY or the like I will respond sooner if possible. If for some reason email won't do, you can find other means of contact here, but please don't call on the phone before 8 a.m. or after 9 p.m. unless it's an emergency.