While others across the industry battle it out over 10-gig claims, Google Fiber is looking to go bigger, plotting the rollout of a symmetrical 20-gig service for select residential and business cus | The service will use Nokia's 25G-PON gear and initially be available later this year as an invite-only product.
Buy a media converter and do 25G -> 40G and run a 40GbE home net. Retired 40Gb gear is ludicrously cheap.
Edit. Or just stick a two port 100GbE card in your router, use an adapter to step one port down to 25Gb and run 40Gb off the other to the rest of the network.