You surprise me. The technical specs of the Soundbridges are no secrets, and the missing features you mention have been discussed over and over again in these forums. You obviously didn't inform yourself before buying the Soundbridge, so don't complain afterwards that you bought a pig in a poke.
Well, actually it seems that not all reviewers are missing these features, I have read two reviews and haven't seen any complain about these things. You can't expect me to read through ALL reviews and I can't expect that key features, that EVERY modern playback device has, are missing in the SBR.
Anyway, I know that the SBR is not perfect. I bought it because I knew Roku listens to its customers and adds features with firmware updates. I am here because I do a feature request for something and just wanted to express that I was missing these things urgently.
For power saving you could consider using a power strip with a switch or a wireless remote control power outlet (but if you do, always put your Soundbridge to standby and then wait ten seconds before switching it off.).
Not gonna work if being used as radio clock, as in my case (I actually see the SBR as a radio clock, it's been obviously designed to be one). Just to add: while a switch is an option always recommended for standby devices, people just won't use this in most cases, which is a fact that should be considered.
I have seen devices where the producer was able to lower the power usage long AFTER the delivery to market (Fritz!Box 7170 Router by AVM Germany), so I guess there are options to lower the standby power usage. Roku seems to be able to build good devices and extend them by new features and I am sure they are able to do the same as AVM.
WPA2 is supported.
Yes, thanks, it works. I had WPA only in my mind, guess that information was old (had to go WEP first because of the old delivered firmware and didn't test WPA2).