No, the speakers are wired. The system does not have HDMI in/out but it does have 2 Component In's and 3 Optical In's.
What you could do (as I did) was just connect your devices like a PS3 HDMI or Component to your TV and connect the audio Optical to the receiver. Its the same good quality sound you would get through HDMI

they are not wireless, but trust me, this system is worth dealing with the wires. Plus all you have to do is get a third party wireless receiver and you have wireless rear speakers.

No, they aren't. But they do come with 40 ft. cables. Keep in mind, that with wireless speakers, you have to power them separately, too.