I think that the CMS sistems are revolutions in internet design because It new been so ease to make your site but that poverful.But almaoust all CMS are most bugy but there are free and that is the price that you must pay.I think that the besti is Xoops but the POStnuke and PHPnuke are also great.All three works only on linuks/unix.There are powerfull but you must now something about MSsql and PHP to be able to works with this powerful systems. Has someone difren opinion?