As of remoting 2.2.0.GA (just released), there are now repository entries for all the jboss remoting components (i.e. ../jboss/remoting-core, ../jboss/remoting-socket, ../jboss/remoting-http) as well as the original remoting entry (in case someone just wanted everything in one shot). Can find out more about each of the modules and their thirdparty dependencies at http://labs.jboss.com/portal/jbossremoting/docs/guide/ch04.html.
You'll also notice that there is not a remoting-http-jbossweb or remoting-http-tomcat5 currently as remoting only currently supports tomcat5, so there is only the remoting-http entry.