Susan Crawford has background information on today's congress hearing: At that hearing, the Subcommittee will be considering a new Whois bill creating new penalties for people who provide false data when registering a domain name.
The hearing will be webcast. A witness list is not available.
Later: The committee's schedule page refers to this as an oversight hearing; on the subcommittee's page, it's now a legislative hearing on HR 3754 (text here; thanks to Susan Crawford).