Etherchannel will work fine over different CWDM wavelengths, no problem. For a ring, yo need two CWDM-MUX-8A - one in each direction. For DWDM, everything is identical, except that you use the 15216 FlexLayer components, and DWDM GBICs.
You've got it. Its just as if you had 8 pair of dark fiber. You plug in a GBIC, you get a Gig. keep in mind to make a ring, you need two of everything, one in each direction.
That's it. The CWDM-MUX-8A gives you 8 channels of CWDM. You just then plug the CWDM GBIC or SFP into its channel ports (TX and RX) and connect the trunk/common ports of the mux's together around the campus (you'll need one mux east, one mux west, ...
Fernando,CWDM and DWDM GBICs, SFPs,and 10G Xenpaks are perfectly viable options for building simple, low cost xWDM networks, without the requirement for more costly transponder based solutions. As far as 'configuration', there really is none on the ...