For HVAR2012, publication by AAVSO of results of the spectroscopic campaign on epsilon aurigae are available.

An analysis of the behaviour of the K 7699A and Na D lines by Robin Leadbeater  during eclipse can be found here
An analysis of the behaviour of the h alpha line by Benjamin Mauclaire during eclipse can be found here
A large collection of spectra has been gathered by Robin Leadbeater here
By the way my spectra are present in both analysis as many other amateurs. Nothing can be done alone, this campaign was an example of what a pro am spectroscopic campaign should be.
An extended long term monitoring along the 27 years of the orbit is encouraged. Send any spectra to Robin Leadbeater as long as an on-line database will be available. Do it for the next generations.