Max user connections from Postgres Linux 7.2.1

Can someone tell me what the maximum user limits I can expect from a redhat
7.2+ server running postgres 7.2.1? I am about to develop a large number of
projects using the postgres engine, and need to know if and or what
limitations I will run into on the user access side. 

If this is covered in a faq that I have missed, I apologize ahead of time. I
have at least tried to do my homework.


Thanks,