Is the yahoo sitemap effective?

Has the yahoo sitemap really helped anyone?

after a few months I noticed that hardlyu any of my site is indexed in yahoo. As a matter of fact I have over 20k entries in google and less then 4,000 entries for mymodeltalk.

I actually get more refers from MSN live searches then I do from yahoo. That's a little disturbing. Especially since I don't have a sitemap for msn.

Google sends me loads of traffic.

bump...........

i think yahoo in general in whole as a search engine is dying a slow death.

only reason why msn still ranks, is because its built into ie7.