Metro Ethernet on a comeback?

After a few false starts looks like Metro Ethernet might be making a comeback of sorts. I am currently trying to take a look at this market and see who are the folks who are doing well in this space. I have heard that some of the Bells are seeing an uptick in demand for their Metro Ethernet products. The demand from Wi-FI, WiMAX and cell phone carriers is said to be pushing up the demand.