You can see the note for yourself HERE, and also go and donate the 25 shekels traditional Purim payment there too, but what I found very interesting is that the Rav specifically wrote:
"[please] pray that the Rav should get out of prison before Purim, because then two thirds are finished."
I don't know about you, but that sounds very much like a reference to all those scary '2/3 of the world being destroyed' type prophecies that are due to occur before Moshiach shows up, unless something happens pronto to sweeten those judgments.
Rav Berland went into exile, and took on all his terrible suffering, humiliation and imprisonment to sweeten the judgments hanging over Am Yisrael and the whole world.
He's not given to big, open statement about anything, but the people who know really know that the Rav is sweetening things for the Jewish nation and the world, and if he's saying he needs to get out of prison before Purim 'because then two thirds are finished' - that could have massive implications for what's about to happen.
What's 25 shekels? Nothing!!
So please, even if money is tight, head over to the Shuvu Banim website, donate your 'half a shekel' and pray for the Rav to get out before Purim.
It could make all the difference between geula coming the sweet way, or not, God forbid.