joomla is the one
hi
joomla do a very nice wc3 compliant version of a CMS. Works beautifully and you can add designed templates to it easily. Add some nice menus and SEF urls and it produces an excellent google friendly site.
One note about typo3 is that it is not intuitiave, learning curve is steep and there are links to the developers site for addons. this external link to have the site addons working is kinda risky.
Joomla is the forked mambo and most development seems to have moved to joomla at this stage. Alto that said alot of the joomal addons will work on mambo.
regards
Sean