BNI Heartland (Nebraska, Wyoming, South Dakota, Iowa) members passed over $40 Million in business last year. BNI helps members grow their business through structured relationships leading to referral generation. BNI: Largest Referral Organization. BNI Website BNI Heartland – NE SD WY IA - Business Networking Referral Organization page for Nebraska, South Dakota Eastern/West, & Wyoming in English (US)