I have been browsing the web and found new shiurim on Yerushalmi that can be downloaded in MP3 format or listened to directly online from the kolhaloshon.com web site.
1) Rav Ephraim Goldstein – Shiur in Talmud Yerushalmi (English)
2) Rav Mordechai Rudman – Yerushalmi (English)
3) Rav Bunim Schreiber – Daf Shiur in Yerushalmi (Hebrew)
4) Rav Chaim Kanievsky – Daf Yerushalmy Shiur (Hebrew)
5) Yerushalmi along with Daf Yomi Bavli (Hebrew)
I got permission from Kol Halashon to copy the shiurim and post them on YerushalmiOnline.org web site. This will take some time, especially the ones that are in the process of being recorded.