The answer is clear: If you are not a HIPAA covered entity, using Insight Notes will not automatically make you into a HIPAA Covered Entity.
Stated slightly differently: merely transmitting electronic information doesn't make you a HIPAA Covered Entity. Transmissions fall under HIPAA if they are made in connection with a specific type of transaction (usually for reimbursement purposes). If you are not a covered entity and do not use Insight Notes to export your notes for reimbursement or another HIPAA-defined transmission, your status as a non-covered entity won't be jeopardized.
Of course, if you are a HIPAA Covered Entity, using Insight Notes is entirely consistent with your obligations under HIPAA. It is highly encrypted and secure, and we will sign a business associate agreement.