The ii.no domain has been registered for over 10 years which means that it has over a decade of being listed in search engine indices. The benefits of this for SEO puts it way ahead of other more recently registered domains.
At no time has it hosted any content that might seem unsavoury or unsuitable. It's primary goal was to provide a portal for a programming based community; no profanity, no nudity and no political or religious views have been stored.
Finding a sensible, let alone available, 2 letter domain is the equivalent of the virtual 4 leafed clover, at the end of a rainbow! The opportunity to acquire a 2 letter domain does not come around often, this really is a once in a lifetime opportunity.
This is a norwegian based TLD domain, and with that comes the security that a modern European country registrar provides in terms of trust compared to Pacific Island or micro state registration.
ii.no provides a level of flexibility not generally available with more complex domain names. Not only will you have the flexibility of multiple English language "word play" subdomains; cas.ii.no or cappucc.ii.no for example, but many other non English based companies and phrases incorporate the (i)ino suffix.