Is the mobile phone virus threat over-hyped?

I have just returned from a couple of days spent in Helsinki, the capital city of Finland, as the guests of IT security specialists F-Secure. During my visit I discovered many things: eating bear sausages and elk mousse gives you tummy ache, it is actually quite warm in Helsinki at this time of year (although you can ski to the F-Secure offices in winter), only 6% of the population speak Swedish and mobile phone viruses do actually exist.