Another potash company in the region is an Australian outfit, South Boulder Mines (STB.AX). They have already proven up a decent potash deposit in Eritrea and they have gold and nickel in Australa as well. The stock ran up to around $5 on the initial announcements but is back to a more reasonable price now. Not many shares out for an Aussie company but plenty of liquidity. Drilling is continuing and they seem to hit paydirt with almost every hole over a very wide area.

http://www.southbouldermines.com.au/