https://lnmainnet.gaben.win/
125 channels / 65 nodes on mainnet now.
Still, don't be #reckless wait for a stable idiot proof release.
There are people buying real, physical things paying with lightning already. Take this guy for instance, he paid $2.50 to fill the channel:
https://www.reddit.com/r/Bitcoin/comments/7rkunw/lightning_the_future_just_arrived_at_my_doorstep/
The problem is when you run out of money, you must refill the channel with another on-chain transaction, so this incentives people to put as much money as possible at once on the channel, something that may not be viable for most people. For example if you want to buy a router, let's say it costs $150 bucks.. well most people isn't going to put more than that, so you would already spend all of your channel's funds at once not saving money.
I wonder he did get such a low transaction for the on-chain one tho, $2.50 is super low even if you use segwit. He must have gotten lucky with a period of low mempool activity.