imo .pk domains will be big. I am pretty sure Pakistan recently introduced a countrywide Wimax broadband system. They already have a decent internet population so give it a year or two and you will get impressive results.
Golf is a known sport in Pakistan, but they are much more interested in Cricket, Hockey, Polo and Football. I am sure Golf will eventually pick up though.
And generally speaking majority of Pakistanis speak Urdu as a national language, but they also have regional languages like Punjabi, Pashto, Baluchi, Kashmiri and Sindhi. Among internet users, English is popular and Urdu written using the Roman alphabet is also common.