It's easy. You can do the job in your browser with the plug-in wallet.
Do you support Multi-Sig wallet?
People like me who are paranoid about safely and security will always think several times before jumping to a new service when the service is already available in a well known wallet. If the product indeed has many things that is better than Electrum offers (in terms of mass payment) then you need to work to increase the customer confidence. What is your panning to market the product? Feel free to contact me if you need help in Bitcointalk marketing.