Soooo.... I just placed my order for two Era 300's, and although I was aware of the lack of an Ethernet port on the speakers, I'm a little peeved that Sonos didn't include an adapter with the speakers - and that they are asking $40/ea for them. Yes, I should probably have expected this from Sonos, but it annoys me just the same. Now I have to shell out another $80+ for the ability to hardwire the speakers.
We all pay a premium for Sonos hardware, and I'm not complaining about that - throw in the dang adapter guys, or let us buy it at cost.
Grrr....