120
Google Fiber is offering early access to $250 per month 20-gig service - The Verge
(www.theverge.com)
This is a most excellent place for technology news and articles.
How the heck do you even utilize that? Most hardware doesn't get beyond 2.5gig yet, you got to pay out the ass for 10 or higher since that stuff is all datacenter grade. You'd need a router or even just a computer with a QSFP+ port I guess. Easily several months bills in networking hardware if you don't want to end up bottlenecked on your side. Definitely not for the typical home user anytime soon.
I can get 8gbps for a reasonable price. For ~30 less I'm getting 500mbps because my firewall only supports about 700mbps of actual throughput.
The home 2.5GE routers might have 2.5gig nic but I highly doubt they can support it for a sustained time.