Another value add is 4G failover for broadband circuits. I have clients that sell cable and DSL to a business for redundancy or load balancing. That's a great way to keep the customer up and happy. MegaPath has 4G backup plans that it sells with its DSL offerings for Business Continuity.
When it is mission critical that the business have Internet - like being able to process credit card payments - what are you doing for a backup? Fuse Wireless Telecom offers 4GFailover.com plans starting at $29. There are others, like CLEAR which offers a resold Sprint EVDO device. Just a thought.