I was looking for a USB Hub to use with Chromecast and found this.
I received it today and can confirm that it works with Chromecast with Google TV and I could attach an external mouse and keyboard to my Chromecast with it. Not sure about the quality but the reviews seem to be okay.
What do you mean it works with Chromecast? Do you connect chrome cast in the HDMI slot then access the content on your PC like it's a tv set?