Yahoo has now started to support NOODP Tag. We can use now below tag to not to display ODP title & meta tags for yahoo. META NAME="ROBOTS" CONTENT="NOODP" or META NAME="Slurp" CONTENT="NOODP" You can read for more on the - http://www.ysearchblog.com/archives/000368.html
Slurp is the name of Yahoo's spider and NOODP means that they won't use your DMOZ title as your title in serps if you're listed in the DMOZ.
I do not know what took them so long to follow Google and MSN. NOODP = Do not use Open Directory descriptions on search results snippets.
if i have listed in dmoz and in dmoz my title is "xyz" and in real my site title is "abc" then which title yahoo select?
Now, Yahoo! has mentioned they will also add the No Yahoo Directory directive as a follow up to the NOODP thing. Good one!