Couple of questions.
1) Do the 10GE modules support etherchannel? I assume no.
2) Real question...We have a city laying fiber in a two rings (not sonet, just terminated with edge switching like 3750's and 6500). The dual rings are provided for redundancy. Most of the locations, especially the core location that has/getting a brand new Cat6500, will have 1GE connections to each fiber loop. At the core 6500, can I etherchannel across two 16GB-port line cards to each ring? My first concern is that each ring may not have exactly the same length/roundtrip time, so I was not sure if that would have an affect. Also, I obviously need to consider STP and routing issues, but the etherchannel question in general is top of mind.