Chrome for iOS now supports browser-based Chromecasting
Chrome for iPhone and iPad is getting a small update today that allows supporting mobile sites to beam the site to the big screen over Chromecast. This may be redundant if you've got an Apple TV and AirPlay mirroring on the go, but options are always nice.
Finding Chromecast-enabled sites are pretty tricky, but Chrome is a solid browser, and if you're not using it already on your iPhone or iPad, you should really consider giving it a go. Chromecast is also particularly awesome, and if you've got a spare HDMI port on the back of your TV, it's worth picking up at that price.