asterisk users - Jan 2006 - Need a good extensions.conf sm bus config w/ polycom phones

Hello-

We've got a patched-together extensions.conf that's barely working  
for us, and we need to get real about using Asterisk.

We've got a couple of remote workers with Polycom IP-601 phones, and  
a single asterisk server, using a couple of incoming DIDs from teliax  
and sixtel.

Does anyone have a good extensions.conf that they'd be willing to  
share, that provides a real-world tested dialplan?  We'd love to see  
what other people are doing - (preferably those using all these cool  
features that polycom phones are capable of).

Thanks-

Tom