By Southern Oregon, do you mean Southwest Oregon? This area includes Douglas, Coos, Curry, Jackson and Josephine Counties. This area is very rich in gold history, and yes, nuggets are still found.
If you mean South Central Oregon (generally Klamath and Lake Counties), or Southeast Oregon (Southern 2/3 of Malheur and Harney Counties), there is still gold, but it is much less abundant, and any nuggets are generally small.
There are several prospecting websites that have at least some information on Oregon, including sections of TreasureNet. Diligent searching on the various search engines can help out a lot.
I should add that before a stroke a few years ago I did find a few small sub-gram nugs on the South Umpqua.