I would like to make a note that I think our cl_cmdrate is supposed to be 60, if you have net_graph on and you look at the number on the far right then you are looking at cl_updaterate(top) and cl_cmdrate(bottom). If you put cl_cmdrate up to 100 it still stays at or around 60, when you push it to 100 you actually end up losing fps.
For better information please see this article about the commands Liam referenced above.
http://www.fishtankclan.com/e107_plugins/c….php?content.44
I think going by this will help everyone out a lot, it has a lot of good info there so check it out.