no just kidding yeah all mhl adapters i have seen have a usb charging port to them as well as the hdmi out.
be aware i have seen a review that states some are designed(as the one i bought from monoprice-should be here tommorow) to charge through the tv usb and dont play well with the normal ac charging..so something to look for. not sure if this really matters but someone in a review complained of this and monoproice said it was designed to charge through the tv's usb port.
I will test it when i get it. but yes it will charge.
for info. the mhl spec can charge through the hdmi cable, but i dont know of any tv's yet that support this.
I see a slow discharge as well with that adapter, I'm wondering if my phone will last long enough to play a full length movie.
And another problem I'm having is the TV screen goes blank on occasion while attached to my GN, not sure if its the phone,adapter or TV?
Rockin 4g on my Nexus - FINALLY!