Well, today is the big day — number portability has finally arrived, though unless you want to spend most of your afternoon on hold, you’ll probably want to wait a few days or weeks before making the move to another carrier. Though if you are deciding to make the move, Om Malik and Alan Reiter each have lots of excellent tips and guidelines for switching their weblogs and there is a new site called NumberPortability.com which can help you find a better deal than the one you have now. And while we’re thinking about all this, Dan Gillmor of the San Jose Mercury News looks at what portability did for Hong Kong and how it might affect the cellular business here.