Go to http://confhub.com;

Register as a new user (if not before), by clicking the “Join Now” link;

Log into the system;
Add ICFP into “My Conferences” folder:
Click on “All Conferences”;
Search for “ICFP” and select (ICFP paper for authors and ICFP portal for non-authors);

Click on the “Payment” logo on the top of the screen;

Choose “Online Payment” or “Offline Payment” to register; 
Online payment means you can register by yourself online using your credit card through your PayPal account.
Offline payment allows you to fill your credit card information and the conference organizing committee will do it manually for you through PayPal virtual terminal

If you have any issue with using paypal to register, please send an email to servicescomputing@gmail.com. Our Registration Chair will help you register manually. Please remember to mention you are registering for ICFP 2011 in your email.