It will depend on your deployment. 80 people hitting the server from 80 seperate instances of the application running on 80 seperate machines will cause 80 pools (one for each process) to be created. Multiple connections within the process will be able to take advantage of pooling.

OTOH, 80 people going through a serviced component to get access to the database will cause a single pool to be created (which COM+ will manage) and the app will need less connections to service those 80 people.

-Mike