There is also Interchange. It is geared towards ecommerce, but it is fundementally a CMS. It's time tested, well supported with a very active community, though IMO it can be a little warty due to it's heritige (MiniVend).

Interchange also has plenty of documentation about setting up in a shared enviroment. It also has more of a framework already setup, including a fully functional e-com starter program (don't worry it's quite easy to dump the e-com stuff if you don't need it). You could quite easily have functional site in an hour or you can start a site up from scratch. It has it's own custom templating system and an easy way to create custom tags.

That being said, After many year with Interchange I am switching my main development focus to Catalyst.