SNMP::Effective
I’m done writing the code for SNMP::Effective now. It has show to be quite promising after some tests: 4000 hosts in 50 seconds is quite better than what I had with a previous module. I’m hoping to release SNMP::Effective on CPAN, later this year. But first I need to complete eAdmin 2.0
In the meanwhile, you could try SNMP::Multi, which gave me the idea to write my own.