USB Cable Length

Me again!

I'm planning to run a USB cable from my control room to an outlet in my media room. The (perhaps embarrasing) reason for this is to link my USB microphones back to my Wii in the control room. My concern is what I've read about the length limitations of USB.

My plan is to run the USB from the Wii, 10ish feet to a wall plate. There it will hit a powered hub that will connect to the mics.

The question is how will this USB run impact the signal/power? I've read that 15ft is the maximum for USB, but the run from the Wii to hub will be shorter than that, but the mic cords will run an additional 8ft or so. Will the powered hub make a difference?

Does all of that make sense? Thanks.