There is a danger in personal lists of Optigen results unless you are willing to check that those submitting their results are telling the truth by asking to see copies of their Optigen certificates. This is what happens with the Cocker Club Welfare booklet and presumably with some of the other online lists on personal websites. I'm not in favour of online lists of genetic results really unless they're under the control of a kennel club or national breed club so I wouldn't contribute to another online list, sorry
In the future, it will be easier as the KC will incorporate Optigen results into the registration system as they have recently done with Labradors & Miniature Poodles. Are you a member of the Cocker Club, Peta? If not, why not join? You'd have access to all the info you need then
Edited to add a link to a European list of Optigen results :
http://www.caras-cocker.de/dna_2.htm