Chat Room on RCU
Chat rooms have been discussed here in the past, so I'll let you search those posts out.
RCU does have a private instant message feature. Look at the bottom of anyones post to see the PM button... Private Message. It works much like ICQ or AIM. You may also click on the "Buddy" button to add that person to your list of PM contacts. All of which can be seen by clicking the "MyRCU" link at the top of every page. Enjoy.