This is America Online's ubiquitious Instant Messenger (SM), a chat-type client that enables you to converse with any AOL or AIM user. You'll need to have a "netscape" binary in your path to complete the (free) registration -- the www/netscape package is fine --, or you can use your ID from Netscape Netcenter, CompuServe 2000, AOL Hometown, or AOL.com's Personal Finance center.