Each month I am seeing more and more of the traffic coming to my websites from mobile devices. iPhone, iPads, smart phones, cellular network devices. So I think it is about time most companies start to consider offering mobile versions of their websites. Mobile versions of a website will create a better user experience and will keep mobile users on your website longer and are more likely to convert in to a purchase or revealing their contact information so that they can be marketed to in the future.
A mobile website would consist of a cut down version of your existing website with lest content per page and likely less content overall. Skipping high resolution pictures and pages that require a larger page format. This is likely good for conversion anyway as when people get on these mobile sites, there is less clutter and you can lead then to conversion much easier.
Consider starting a mobile site today that will lead to capitalizing in these new devices. In the last 30 days 15% of my traffic has come from mobile devices. Last year during the same time it was 4.5%, over a 3x jump. Mobile is here to stay and it is growing.