<p>This info is slightly out of date, but generally accurate:</p>
<p><a href="http://www.fas.harvard.edu/computing/about/statistics/survey03.html%5B/url%5D">http://www.fas.harvard.edu/computing/about/statistics/survey03.html</a>
(15% of students bring laptops to class.)</p>
<p>Bring a laptop; you'll feel pretty stupid dragging your desktop to the fifth floor of Canaday.</p>
<p>If you're planning on getting a new computer, wait until you've been issued a student ID number and then buy an IBM Thinkpad from <a href="http://www.computers.harvard.edu%5B/url%5D">www.computers.harvard.edu</a>, since you can get like 40% discounts.</p>
<p>Wireless installation in the dorms is progressing very quickly. I'm not allowed to give details, but let's just say it would be reasonable for you to expect wireless access in your dorm.</p>