Forum OpenACS Q&A: Re: Debian stable or testing? apt-get or yum? etc.
Libranet sounds interesting, but there don't seem to be any docs available on the web, and it's not really clear what you end up with once you're installed. AKA, can you easily update from the official Debian package repositories, or are you locked into Libranet somehow?
There's more helpful Debian install info in the Jan. 2004 Best Configuration in Debian for Openacs Development thread.