the MMDS internet used to run off NextNet equipment I believe. It was the first set of equipment that Clearwire used before Round 2 of fixed wireless. The company is now owned by MOT that made the equipment.
WatchTV also took over what was once ComWavz which was a show case for Cisco with their Aironet routers for Wireless 'net. www.comwavz.net (ComWavz was also a case study published on the Cisco website)
WatchTV resells DishNetwork (i believe now) to customers using the MMDS and is expanding their reach with (or did) with another 1,000+ foot tower. It was being discussed here a few months back.
WatchTV is also owned by a small ILEC as well. »www.brtelco.com/
WatchTV is based in Lima. the ILEC is just outside Findlay OH and Comwavz is in Findlay and Lima.
One must note that WatchTV also competes with TWC and Comcast and WILL DO city installs if you can obtain service at your house.
MMDS is a very interesting technology and a great way to avoid the state's cable laws now. most states do not include MMDS as part of their state wide agreements. Ohio is one of them. For the most part all one has to build is afford to buy/lease or obtain the MMDS spectrum from the FCC or someone else and then build out the network with a tall enough tower and contact DishNetwork or DirecTV and start reselling.
That's about all they're doing for TV.
For Internet they're using MOT CMTSs and MOT cable modems and sending the signal wirelessley and works fine.