It seems lots of recent startups are using the .io domain. What are the reasons behind this? It must be more than just domain availability, as there are lots of domain extensions to choose from with lots more availability that .com and .net.
I <i>guess</i>,<p>1 - It implies IT tech related, IO = input/output, as pointed out by otoburb;<p>2 - Domain name availability, as pointed out by yolesaber;<p><i></i>3 - Google named its developer conference 'Google IO', just a guess.