I currently have a domain which I use for business purposes. The domain is controlled by the same company that hosts my site, although it is registered in my name.
I have heard lots of horror stories about registrars going bust, and then domain owners being unable to regain control of their domain. In some cases, the domain lapses and is subsequently brought by someone else, who holds it ransom.
So, should I look at moving my domain to a new registrar, such as godaddy or some other large company. My hosting company is by no means a fly-by-night (I have had websites with them since 2005), but I do worry that one day they could vanish, along with my domain.
It is a .co.uk address, so responsibility rests with nominet. However, I know they can be quite unhelpful when it comes to reclaming domains.