Buyer Brokerage Agreements

Just a quick post to see how many of you guys are using the Buyer's Brokerage Agreements???? The ones that are published for 2009 have a new paragraph which allows for the Realtor to represent and charge a retainer that is non refundable if the client doesn't buy. However, if the buyer does close a transaction the retainer is refunded to the buyer and the seller pays the buyer's Realtor's commission. I had a question come up today about which account to deposit the retainer check into. I think that it should go into the escrow because it is being held in trust until either the BBA is disolved or the transaction is consummated. Is anyone else using this really important form and if so where is the retainer being deposited????