We were able to get i0.io when it dropped today. It’s a pretty excellent domain hack.
Note that it is NOT LL.io, but rather LN.io as in “I-zero.IO”
It’s a great, cool hacker domain and I’m sure would be brandable and fun to use.
There are no more 2-character .io domains left - they have all been registered a while ago - and this is one of the nicer ones.
You can view the auction for i0.io here.