This might be common knowledge to others but it took me awhile to find. If you're looking for a listing of public mirrors of various MLS regions check out http://www.mlscloud.com/. I'm researching a market outside of my local MLS region and it took some searching to figure out where the new MLS was. Hope it helps.
Thanks, will be transferring soon , am already researching different cities and this will help.
Update. The mlscloud website went away. Now I'm using: