The NYSBA just released Ethics Opinion 1273 which opines that "[a] lawyer may accept real estate clients referred by an associate in the lawyer’s firm who is also a licensed real estate broker, provided the lawyer does not share legal fees or real estate commissions with the broker/associate and the lawyer obtains the client’s informed consent, confirmed in writing."
However, attorneys should remember that Rule 1.0(j) defines "informed consent" to "denote[] the agreement by a person to a proposed course of conduct after the lawyer has communicated information adequate for the person to make an informed decision, and after the lawyer has adequately explained to the person the material risks of the proposed course of conduct and reasonably available alternatives."
Consequently, simply alerting the client of the situation is not enough. There must be "adequate" explanation of the risks and other options - which theoretically includes hiring an attorney from another firm.
While this opinion will likely be well received by brokers and transactional attorneys alike, it's still filled with a litany of problems because any scorned client is going to claim that they did not receive an adequate explanation to make an informed choice. It's also important to note that the opinion is about the associate referring her client's to the attorney, but what about referring the other side of the deal? That's not addressed by the opinion and it's theorized that would be non-waivable because of the concurrent conflict of interest, but who knows.