The Internet2 network publishes 10-second data for all interfaces on both its backbone network and the individual racklans in each of its cities:
Backbone:
http://dc-snmp.grnoc.iu.edu/i2net/
Racklans:
http://dc-snmp.grnoc.iu.edu/i2net-hp/
Default graphs don't show errors. You need to create a custom graph and click the appropriate checkbox. If you want to view a large number of interfaces with their errors on a single page, you can create a Custom View that includes errors for any number of selected interfaces.
-Chris