Private WHOIS Registration

I registered my domain with Dreamhost, however the affiliate network that I am trying to get into requires that there is no private block on the WHOIS.

How can I remove the block on the WHOIS, and how long will it take for settings to take effect?

You can go to the panel for Domains -> Registrations, and check the Modify box for your domain, then click the Modify WHOIS button at the bottom:

I don’t know how long it will really take, but probably about a day.