Frank, our company is currently using the old ACS 3.4 Intranet module.
The dotWRK project is creating an OpenACS based Intranet, and I'm going to be porting our data from the old Intranet to dotWRK. I'd recommend this route, as it has a better future, and the upgrade effort involved is pretty substantial. Are you already using ACS? If not, I'd definitely go with OpenACS instead.
If you are already on ACS, and decide to upgrade, I'd be happy to share my scripts for upgrading from the old Intranet to the new one. They won't be perfect, however, and will require testing. 😊
Our company would be much more interested in software to link together our current accounting system with our Intranet than writing a Quicken like application. I may work on this at some point in the future.